Nuclide Symbols: Atomic Number, Mass Number, Ions, and Isotopes

[@TitanTubs]

My teacher could never explain this as clearly as you. Thanks Dave

[@nanajunior7562]

me to

[@rinyeongi6322]

Same

[@SomethingAbtScience]

Likewise... I'm a dropout. Lol

[@thomasbrown6376]

I'm a chemistry teacher. Your use of graphics and your clear explanations are magical. Thank you!

[@NININAVlog]

Same here 😂

[@gandmsparklydaynight3993]

Impressive you explain better than my chemistry teacher!!

[@jamesgoulet2254]

G and M sparkly day night damn straight

[@zienzeng4983]

ME TOO

[@hamadgbk3190]

facts

[@wellox8856]

our teacher just sent us here sooo... yeah 🤷‍♀️

[@AlexeArt]

@@wellox8856 same

[@fowziachowdhury8774]

I’m binge watching the entire series because I have a final test tomorrow. Thanks for such great review

[@ashleysmith3162]

Same!!

[@david2869]

I'm binge watching for fun! I haven't had a chemistry test in decades.

[@creatorhandle6213]

Thanks for such great review

[@aliciacohen5279]

Did you pass lol. I have one tomorrow and have no idea what’s going on

[@iranianintelligenceagency9337]

@@aliciacohen5279 How'd you do

[@damienkern6446]

Bless KZbin educators. Poor kids would be lost without them

[@rayhanrani3857]

This guy is the GOAT!!! My mom asked me if I needed tuition for Chemistry: ME: I pull out my phone, swipe to youtube and show her Professor Dave :)

[@TheKids422]

same except for every Physics

[@JackCodeKid]

Knowledge is free on KZbin lol

[@farhanahmed2508]

Nhật Tuấn that's good, isn't it? 😊

[@thegoodlydragon7452]

It amazes me that out of pure snobbery a lot of so-called "real educators" in the academy still snobbishly snub their noses at KZbin when KZbin actually often does a far better job educating people than they do. These chemistry videos are more informative and clear than A LOT of professors who drone on confusingly with their chicken scratch handwriting and a marker doodle or two. The clear graphics alone make it easier to follow, not to mention it's explained well. Many teachers are glorified educational KZbinrs, but with smaller audiences. It's like the professors are scribes at the dawn of the printing press, bitching about how vulgar it is that the words are stamped on the page rather than handwritten.

[@SangheiliSpecOp]

@@thegoodlydragon7452 youtube is amazing but because it's free, there are institutions out there that will doubt it's credibility so they can still charge for their programs, even though their curriculum may be no better than what is on here

[@killuazoldyck5864]

❤️

[@habibrahman9154]

KZbin isn't free😝

[@satyamchand444]

Blew my mind at first but after giving some time to this video , it proved to be very effective and useful. Thank you very much.

[@eyesinmythroat4073]

and in a single evening you’ve summed up my semester of chemistry except now i can actually understand it. life is magical

[@unknownguy8232]

It's shockingly short and very well explained. Thanks Professer Dave

[@balakumaran6056]

most powerful thing of your teaching style is let's check comprehension. comprehension makes concept as strong, thank you professor

[@TheToxicMegacolon]

My first chemistry prof, thank you so much!

[@amandapager1435]

Thank you so much for this, my comprehensive test is a day after right now. I’m studying for 12 hours and this helped me so much. Thank you

[@spenhunter3592]

litterally subscribed fr

[@manyboy5642]

thx i usally don't comment on Videos but this helped me for my test so thx

[@heatue3063]

4:21 how to get the answer of the atomic number in the 3rd row?

[@sustmi]

From the periodic table. The atomic number (ie. number of protons) identifies the type of element and vice versa. Sn always has atomic number 50 and there are no two different elements with the same atomic number.

[@chomaythan6633]

Thanks a lot. I am a visual learner. I really want to learn chemistry but textbooks are a bit complicated for me. It is also because I am not a native English speaker or learner. I do not need to spend one-hour reading textbook to understand. Your videos explain the simplest way to understand chemistry in such a short time. Thanks a lot Prof Dave.

[@ProfessorDaveExplains]

thanks for watching!

[@justinpettit3432]

Do you understand his "checking comprehension" part? Because I don't get how I'm supposed to figure that out with the given information of this video. Nothing in the video explains how to figure out those things.

[@yetanotherchannelonyoutube]

@@justinpettit3432 The video explained everything in the check comprehension. The only thing that you would need is a simple periodic table to find each element and its atomic number.

[@thewildrobb]

I'm taking Prep General Chemistry this summer in a 4/5 week college class so in Fall I can take General Chem. I haven't done chemistry or math since HS and I was so scared but these videos are helping a ton! I actually didn't learn how to calculate all these things because we didn't have a chem teacher until like MARCH so we had to scrunch everything and really only learned about the periodic table and different types of mixtures.

[@ceylon4855]

Thank you so much! This really helped me better understand the charges with electrons/protons on the nuclide

[@TheKids422]

Cover more topics, we're waiting, you are literally the smartest man in existence.💖

[@505-g6t]

I'm in year 8 and I want to study more complex things than what I am taking now, this was really helpful thanks.

[@Phoenix-pk3fx]

Aeventus this is me 7 years ago lols, I can relate

[@Lynn_l]

Goodluck with your GCE'S or u must be in college or sixth form

[@curlyhead20]

@@Lynn_l 11th grade😂😂

[@mxoeneod90]

@@curlyhead20 you are legend man me from hs

[@anushgudimetla6260]

We both are same. I am also in 8th. I am a version of you, but 6 years late.

[@xBobz99]

Very concise summary of periodic table basics!

[@roce6296]

your the best. I am starting to hate chemistry but you made it simple. thank you

[@Felishamois]

I keep gawping at the quality of this channel :)

[@mirlamurillo3473]

Hi, can you explain in each video how you got to your answers! Please. That would greatly help. Thank you for your videos.

[@jordanjay1479]

He's literally better than all the teachers that I have and his education is free!!!!

[@shaan_Finland]

Best tutorial ever ❤

[@vintinoo1924]

Been watching all these videos and taking notes on your biology and chemistry vids ! i really enjoy expanding my knowledge and ive been absolutely fascinated with the origin of life. Hoping learning all this will help me understand more !!!

[@rambo3636]

4:22 I think you missed the 1+ at the top right of kalium(K) in the 4th row. The same goes for the 3+ on the iron(Fe) in the 5th row and the 1- on the chlorine(Cl) in the 6th row. It is a bit confusing, because on the tin(Sn) in the 3rd row you wrote 4+.

[@DEADKingakaDK]

they don't have to have charges. they're neutral that's all.

[@DEADKingakaDK]

@@zequojai neutral means they are balanced and have no charge. This is theoretical.

[@neleh2377]

@@DEADKingakaDK butiin the colomn "charge" they do have a charge!

[@spadesofhearts7714]

This is exactly what I was thinking

[@acesagayno]

@ram bo Thanks a lot! I was also confused because of it.

[@TheKids422]

very educational, i am highly appreciative

[@nineofnine]

I nearly understood right up till the comprehension test...went over and over it but I guess I got a lot to learn lol

[@motivationalspeeches125]

You are a life saver professor for me. I've been struggling with this throughout my academic journey but didn't find the right answer. 🙏🙏🙏

[@jxkson3358]

Professor you are just fab . Only you are the one who is able to clear all the concepts

[@justinpettit3432]

Did u understand how his lesson was supposed to help with his "checking comprehension" thing at the end? Because I don't. I'm confused.

[@ZeeshanMalik455wasup]

You explained this really well, thanks, I still need some help so I will try to watch some of your other videos

[@TreXsJournal-Coming-Soon]

The part that boggles me is: i.e., if 75 is the percent abundance of Cl 35, what is the point of 75 of 35. Wouldn't that be a percent of an individual atom? The math expression just seems so redundant to me. In my head (and I know this is not correct. The issue is I know how to do it correctly, but can't seem to computer the why), 75 percent should be multiplied by the total of a sample to predict how much of that samples mass belongs to Cl 35. Yet this is so obviously not what's going on.

[@fatallotion878]

I HEART chemistry!!

[@TheKids422]

Ions are different numbers of electrons, right?

[@DaraOgbonnaiye-hj6et]

​@@TheKids422 An ion can either be a positively charged or negatively charged atom. Protons are positively charged particles while electrons are negatively charged particles. If an atom has more protons than electrons, then it's positively charged. If it has more electrons than protons, then it's negatively charged.

[@senorsnap9842]

Im doing hw at 11pm, and this helped a lot thank you for the spare knowledge kind sir.

[@NonsensicalReality]

This makes me see why I never remembered much in science. So much terminology to remember. I keep rewinding it to wrap my head around it all because when I'm watching it I go into the Dr who vortex after a few terms are used together haha

[@justinpettit3432]

Facts. I remember in my school days how I would look in the glossary of the science book to understand what the word meant and the definition was 30 other words that I didn't know what they meant. So I'd look up those and they had words I didn't know in their definitions too. Lol. So I'd do all that work and still have no idea what the words meant.

[@gallectee6032]

@Justin Pettit That's because they cannot explain these concepts well.

[@mandiejonsen]

The mass number for Sn is 118 and the number of neutrons is 69. Your chart at 4:23 is wrong or my understanding is off. Can you explain please?

[@bigguns845]

can someone explain me the result of 112 Sn +4 how did you come up with the answer

[@jasmingarcia7966]

I would like to know the same… I looked at the periodic table but it doesn’t match to the answer…

[@jasonnelson9141]

​@@jasmingarcia7966How so?

[@mariofelipequevedolozano3659]

I'm sorry, in the case of potassium, how did you know that the number of protons was 19 or the number of neutrons was 20? I know the sum of these values has to be 39, but what allowed you to figure out one of them?

[@ProfessorDaveExplains]

Potassium by definition has 19 protons. Check the atomic number on the periodic table.

[@mariofelipequevedolozano3659]

@@ProfessorDaveExplains thanks for replying. Okay, but without actually looking at the periodic table, is there anyway to know one of the two numbers? I'd need another equation, right?

[@ProfessorDaveExplains]

There’s no equation, but yes without the table you wouldn’t know unless you’ve memorized it. But you’ll always have access to a table.

[@mariofelipequevedolozano3659]

@@ProfessorDaveExplains Thanks a lot, professor :). I was doing these exercises as if I was in an exam without a periodic table, but thinking about it, really doesn't make sense to do things that way if I already passed chemistry 1 and just want to remember a few things. Thanks a lot again!!

[@Graywolf848484]

Thanks for the explanation, it really helped. :)

[@strasbourgeois1]

I KNEW I wasn’t the only one struggling specifically on this. Thank you M. Dave.

[@colwem]

In the comprehension table, why do we put 4+ for tin but don’t put a x+/- for any other ions?

[@Charlies_Factory]

Actually an incredible video and I appreciate him not dragging it out. Wish he mentioned cation and anion but its a quick google from me lol

[@danielholta5721]

Am i the only one looking up individual videos just to make sense of this video? This is a whole lot to grasp all at once.

[@justinpettit3432]

I thought I understood this video until he gets to "check comprehension" and I'm like "how the hell am I supposed to figure that out?

[@laurendartnell6326]

@@justinpettit3432 same! :-(

[@incarnatedideaaj1329]

Thanks for helping me, Chemistry was hard at school. Goddd!

[@shivamchouhan5077]

Such a clear and fascinating explanation Thank You prof

[@ecoscopic7872]

I guess Cl 35 - K 19 and Fe26 need charge signs ( in the comprehension check table )

[@borttorbbq2556]

I learn something new I always wondered about why the atomic mass wasn't a whole number I never took a high school chemistry class so yeah. So far I've known most of this because I love science so I have been learning it over the years regardless. Figured I should probably take a look at an actual chemistry course type thing so I can have a bit better understanding in a more coherent way. One upside to being homeless is I have a lot of time on my hands so learning and refreshing one of my favorite subjects being science as a whole sounds good. But I'm sure as we go deeper I will start running into more that I don't know I've been teaching myself most of the basics but there's only so much you can do by self learning. And Dave makes amazing content so it works out

[@DaveGrean]

Just wondering: how do you connect to the internet while homeless?

[@comedian2479]

Thank you for the explanation and post. 🖒

[@shukriabdi173]

thanks

[@AbstractAbsorption]

Does anyone know why in the answers for comprehension (at the 4:28 mark in the video), in the first column ("Nuclide Symbol"), "Fe" and "Cl" don't have charges?

[@carultch]

Because Dave just neglected to specify the charge in the nuclide symbol column

[@AbstractAbsorption]

@@carultch ah ok thx

[@zack189909]

Excellent video! I dare you to go to the LHC and say "there aren't any fractions of a neutron after all." haha

[@sieusieu418]

always love your videos, very helpful. thank u, have a nice day

[@PETERBAKR]

In your review question, I get how you got all of the answers except the Mass for Sn, I have looked at several periodic tables and they say that Sn mass number =118 not 112 as you put into the answer table....I am missing something , can you explain how you arrived at mass number of 112, please.

[@ProfessorDaveExplains]

so the atomic masses on the periodic table are average atomic masses, every element has atoms of different mass, these are called isotopes. so like carbon's atomic mass is a little over 12 because it's the average of all the 12-C, 13-C, and 14-C that there are. watch this one more time!

[@jasmingarcia7966]

@@ProfessorDaveExplainsso how do you calculate it to get the answer? If you don’t mind me asking? Or do you have a video that teaches you a little more in depth?

[@user-nc5wc7dh7l]

So is 'Nuclide' an umbrella term for isotopes, ions and elemental nucleus?

[@ProfessorDaveExplains]

pretty much!

[@chillwithvictoria]

I just don't understand how to fill in the comprehension table😭

[@theelitelance7586]

Use the periodic table!

[@arvin144penjoyer3]

The true saviour of chemistry

[@justinpettit3432]

Him: Comprehension check Me: I don't remember him teaching any of this in the video. Lol.

[@ProfessorDaveExplains]

You must not have been listening, watch one more time!

[@justinpettit3432]

@@ProfessorDaveExplains I watched it a few different times. Still don't get how I'm supposed to figure out that stuff from the information you gave.

[@ProfessorDaveExplains]

All the information is there, feel free to email with specific questions.

[@justinpettit3432]

@@ProfessorDaveExplains I'm not sure what to even ask. Lol

[@remitoinfinity]

@@justinpettit3432 I think you might find the Periodic Table of Elements useful for this

[@christiananderson9001]

There was a lot of information in this video felt like was getting confused then felt so accomplished after aceing the comprehension

[@pragyasoni9757]

Can you please explain how you got the answers for Sn??

[@nana-o2x]

Nice Dave I can do my test now respect

[@Robstrap]

On the comprehension table how come the K, Fe, Cl aren't showing their charge for their nuclide symbol? But Sn is?

[@juijani4445]

Yeah, it's an error that he made. The Prof admits, that he wasn't quite careful and thorough back then as he's now.

[@blainelanders2361]

Fast + No BS = I LEARNED SOMETHING!

[@themexicanmullet9708]

So to find electrons you do the opposite of the sign in front of the charge to the proton

[@carultch]

The net charge of the protons and electrons needs to add up to the net charge of the ion. Protons add charge, electrons subtract charge. Protons identify the element, while electron count is flexible. There generally tend to be certain ions that are more likely to form than others.

[@QUARTZPH]

I got perfect with the activity

[@jumino4565]

I loved the Intro BTW the video was appreciatable.

[@adr5617]

This is the best explanation i ever had. However, i got a little confused with the placement of atomic number & mass when i did the comprehension check. Lol! for example uranium, since 238 was placed on upper left of nucleid symbol, then i thought it was the atomic number. anyway, i already figured it out afterwards, as long as i understood how to do it. Thank you so much Prof. Dave.

[@ElizabethMcDaniel-bi6bi]

This is great! Where can I find a table like this for my chemistry students to fill out?

[@shuwashuwa.soda_]

This was very helpful, thank you!

[@IceyJunior]

can you make 1 about chemical properties and physical properties ?

[@ProfessorDaveExplains]

+Icey Junior i mention those in the types of matter clip!

[@IceyJunior]

Alright thank you Prof. Dave !

[@OurTutorRajanSir]

Can sodium loose 2 electrons?

[@ProfessorDaveExplains]

yep! but the second ionization energy is much much bigger than the first, as it would have to lose noble gas electron configuration.

[@abhishekajit7652]

thanks for explaining so effectively

[@thegoodlydragon7452]

Was how to calculate the # of electrons covered? I tried to deduce that in the checking comprehension part.

[@ProfessorDaveExplains]

what do you mean by "covered"?

[@thegoodlydragon7452]

@@ProfessorDaveExplains I mean in part of the video, I learned that neutrons can be calculated by atomic mass - # of protons (or atomic number). To fill in the part of the chart in the checking comprehension part, I was trying to figure out how to calculate an atom's # of electrons.

[@thegoodlydragon7452]

@@ProfessorDaveExplains By covered I just mean explained in the video. Like "in this video, we'll cover how to XYZ."

[@ProfessorDaveExplains]

oh i see, so a neutral atom will have the same number of electrons as it does protons, then if it has a formal charge you adjust from there!

[@traceynguyen7321]

why do some examples with charges not show a charge in its symbol? like how come potassium-39 doesn't have a +1 in its symbol?

[@ProfessorDaveExplains]

if there's no charge then it's neutral! potassium isn't always an ion, it can be a neutral atom.

[@josephward5436]

I was about to ask the same question! In my work, I have my potassium-39 symbol with a +1 charge, iron-56 with a +3 charge, and chlorine-35 with a -1 charge. Tin isn't always an ion either, but yet Dave put tin-112 with a 4+ charge in the practice problem.

[@OurTutorRajanSir]

Is the word radical a proper synonyms for ion?

[@ProfessorDaveExplains]

nope! those are completely different species. i have tutorials on radicals in my organic chemistry series.

[@auzraerios8170]

how do you find the pen number ,hyphen notation ,nuclear symbol and pen with different eleme

[@ProfessorDaveExplains]

i'm not sure i understand the question

[@kimjungyun1195]

Professor Dave really explains #well

[@yahiatutuncu7508]

I love you, Prof. Dave!

[@hamadgbk3190]

thank you dave for How do we represent an atom, with all of its protons, neutrons, and electrons? With nuclide symbols, of course! These show the type of element, as well as the atomic number, mass number, and electrical charge of an atom. That's all you need to know!

[@hollowmoon7636]

0:08 blues clues???

[@mxoeneod90]

???

[@anatvaradze64]

hi,do you have same table for all elements?

[@ProfessorDaveExplains]

the periodic table! everyone uses the same one.

[@mychaelpierce8049]

Awesome video. Thanks for sharing!

[@peetahhernandez4789]

how can we find the protons, neutrons, and electrons starting with the atomic symbol?

[@ProfessorDaveExplains]

it's all in this clip, friend! the name of the element implies the number of protons (the atomic number), and the mass number is protons + neutrons, so mass number minus atomic number gives you the number of neutrons. if it's a neutral atom, the number of electrons equals the number of protons, if it's an ion you adjust accordingly.

[@talentmachava5022]

Love you😊your Chanelle is helpful ♥

[@drugvilim]

My chemistry teacher didnt explain me that well an atom for two yers but Dave explained it in 5 minutes

[@VyvienneEaux]

2:01 for returning students who just want to know the notation.

[@riddler442]

How is Sn's mass number 112? In the periodic table, it's 118.71. If anything else, shouldn't it be 119? Or 120? I'm struggling to see where you got this number from.

[@ProfessorDaveExplains]

Every element has multiple isotopes.

[@hibanedha3697]

This is soooo cooool... That i ever had in ma chemistry knowledge

[@dealysclashlab7688]

thanks bro

[@juliecushion9778]

Hello, in your checking comprehension table answers, should your Cl not have a minus charge and the K have a positive charge ?

[@ProfessorDaveExplains]

yep that's my bad!

[@juliecushion9778]

@@ProfessorDaveExplains thanks, thats ok, just wanted to check my understanding was correct.

[@RahulSingh-dn1gv]

Sir in which university or school you teach .You really a good teacher. Where are you from???? Plz answer me

[@ProfessorDaveExplains]

i don't teach anymore! i just make content.

[@futuristicdew11]

I wish i watched this series when taking my honors chemistry course in my sophomore year

[@beckylei1197]

Than you so much professor 🌹

[@admiralicecream3344]

Thanks this really helps!

[@JoyceRN-i8b]

Professor may I know, how did you get the 75% in chlorine - 35?

[@ProfessorDaveExplains]

That's the natural abundance.

[@anishtiwari1121]

do you have a video on chemical reactivity series? Also I want to know about orbital and s,p,d,f shells . PLEASE HELP BY REPLYING Prof.

[@ProfessorDaveExplains]

check out my clip on quantum numbers for the shells!

[@unlowyer]

hi Dave, there is something confuse my mind. in question 35 CI number of electrons 18. But I see -1 charge. why we dont add 1. The reason is what ?

[@ProfessorDaveExplains]

We do, Cl has an atomic number of 17.

[@harrisongoodloe2636]

thank you professor dave

[@Palanivel-lo8ml]

Very nice and useful video

[@yahiatutuncu7508]

Could anyone give me a clue of the solution in the comprehension part for just Sn and K, please?

[@carultch]

For Sn, all the information is specified in the nuclide symbol column. We know the identity of the element as tin (Sn), which tells us the atomic number that is also the number of protons. We know the mass number as specified by the number 112. The mass number minus proton count tells us the number of neutrons. The charge is specified in the nuclide symbol, which tells there should be a +4 charge, and 4 fewer electrons than protons. For K, the charge is unspecified in the nuclide symbol, so we have to look to the charge column to see it. The nuclide symbol tells us the elemental identity as potassium (K) and mass number. Same mental excercise as it was for tin.

[@justincrap]

Great outline