Atomic Number & Mass Number | Properties of Matter | Chemistry | FuseSchool

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this echo is making me uncomfortable

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[@fuseschool]

Thank you for your message on the atomic number placement. Position varies on all periodic tables. The point is that we need to remember is that Z is the number of protons and the A number is the mass number. Usually there a key or a legend to point it out on any periodic table given in an exam. There are so many periodic tables, but when you write down an element outside of the periodic table you would write it with the mass at the top the protons at the bottom so 4 He 2

[@pepperskulll]

Why cant my chemistry teacher explain it like this?? geesh.... Thnk you!

[@rafeytariq3263]

Same

[@mdnazamuddinzainab1519]

Same

[@hadiabashir6120]

For all those being confused over mass number being on top and atomic number being on bottom in this video, you can always remember that the larger number of the atom is always the mass number.

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[@jinjinjinjin8849]

Thanks

[@coras_love29]

I love how the elements have little faces to show if their positive or negative or no charge lols

[@aashrithareddy3841]

A small correction they are not elements they are fundamental particles or sub atomic particles

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[@fuseschool]

Glad it helped!

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I love this. Is easy to understand

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2012?! that's nice quality for 2012.

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[@fuseschool]

Glad it helped!

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Thank you!!

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We found the recording distracting which makes it difficult to concentrate on the information being delivered.

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Help in chem and asmr therapy :3

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Thank you so much... Through this video now I am able to understand the concept

[@fuseschool]

Glad to hear that!

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Very helpful! But why is her voice so echoey? It gives me the creeps...

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[@fuseschool]

You are so welcome!

[@reema9913]

thank you so so much this is so so helpful.

[@hanquiyi]

wait, I don't want to sound rude, but shouldn't the atomic number be on top? Thanks from Korea

[@spamsingles5948]

Chloe Mills It should, yes

[@artandanimationxox7897]

In some different regions the atomic number wouldn’t be at the top

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Some regionds put it down

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[@fuseschool]

Glad it was helpful! 😊

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i love the teaching method thank you

[@Gggggggglllk]

on different periodic tables, the atomic number and mass number maybe reversed, for example, the mass may be at the top and atomic at the bottom and vice versa.

[@fuseschool]

+ファン You are right - the bigger number is always the mass number (and smaller is the atomic) because the mass number includes both the number of protons and neutrons, whereas the atomic number is only the number of protons.

[@dazcode]

Yep

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How to memorise periodic table

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Normally in exams you arent required to

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Nyc explanation....thnx fr this video...

[@fuseschool]

Most welcome 😊

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[@fuseschool]

Glad it was helpful!

[@digrenukajayasundara4101]

It was really understandable . Great animation 😉😉

[@fuseschool]

Glad you liked it!

[@sirmeh1523]

Thanks for explaining i heard of atomic number but didnt know but thanks you now i do

[@fuseschool]

Happy to help!

[@careeraimers4822]

I think atomic number should be on top

[@fuseschool]

If you google 'atomic number mass number' you will see that sometimes the atomic number is on top and sometimes it is on the bottom. So don't remember it is 'atomic on top' because it isn't necessarily - remember it in terms of big and small. The mass number will always be the same or bigger as it is the number of protons and neutrons, whereas the atomic number is just protons.

[@tusharkumar2408]

Thanku so much u clear my doubts

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Ty, I found it really useful..ツツツ

[@mahimistry2163]

Thank you , this helped me to understand the concept easily ☺️

[@fuseschool]

Most welcome 😊 Glad it helped!

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Thanks that is really helpful

[@fuseschool]

No problem!

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Thank you!

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Its easy understand ❤️

[@fuseschool]

Wonderful!

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I literally cannot figure any of this out I am so confused how are y'all understanding this I'm on the verge of tears I am this close to dropping out

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Hey, what do you not understand.

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Thanks 🙏

[@fuseschool]

You’re welcome 😊

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Really helped

[@fuseschool]

Glad it helped!

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comedy Talent Tales.

[@blackpinkediting8701]

thank you, and I have a question when told us to get the A number they give us the neutron number on the question right sorry for my English♥️

[@fuseschool]

Atomic number is the number of protons in an atom of an element.

[@LearnIndiaLearn]

I love the voice thanx 😍

[@fuseschool]

Thank you too!

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Thank you!

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[@fuseschool]

No worries!

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Thank you so much l got it..

[@fuseschool]

Most welcome 😊

[@jyjones8965]

Why the echo??????

[@audrey8190]

I'm pretty sure protons and electrons are equal in number

[@fuseschool]

+Audrey Randazzo If the atom is neutral in charge, they are equal. However if it is positively or negatively charged this changes the number of electrons.

[@awawpogi3036]

Audrey Randazzo not always, search for ions for more info.

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Thanks 😉

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It is interesting and the animation is amazing to understand

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Pls put a vdo on finding mass ratio of an element and compound

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Wow nice😊

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Thanks 😊

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Thank you

[@pushkarmourya7268]

How we can calculate number of electron in an atoms?

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Bts forever saranghe 💜💜💜💜💜💜💜💜💜💜💜

[@chaewonstwinsister]

What does it have to do with bts-

[@vincer9960]

What about atomic mass which is slightly different than mass number??!!! Using one or the other can potentially net you the wrong answer. Why didnt you bring that up??

[@Lucky-zc6yk]

whY HAVE YOU PUT THE ATOMIC NUMBER AT THE BOTTOM AND MASS NUMBER AT THE TOP

[@therocketman8933]

Probably they are brithish, i dont know if in U.S they use the periodic table in another way.

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NICE, thanks! ;p

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And then she ended the discussion saying... "AMEN"

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helped a lot

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Nice

[@magickings9824]

why is there reverb? other than that super helpful video , thank you so much!

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good vid usfule

[@Fida2-_.]

Can you say which voice recorder are you using fore this cave effect?I need 🙂👌👌👌👍👍👍👍pls

[@fuseschool]

Oh, that was in 2012, it probably doesn't exist anymore...

[@swatisinha2219]

My chemistry teacher was showing us this during our zoom class 2020 am I right

[@poopa2319]

helpp pls I thought atomic mass number was ratio of average mass of various isotopic forms of element to 1/12 mass of carbon 12 atom in ground state???

[@normanbriscoe8261]

Kind regards 🌹

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[@volodymyrbezverkhniy8687]

The present work shows the inapplicability of the Pauli principle to chemical bond, and a new theoretical model of the chemical bond is proposed based on the Heisenberg uncertainty principle. See pp. 88 - 104 Review. Benzene on the Basis of the Three-Electron Bond. (The Pauli exclusion principle, Heisenberg's uncertainty principle and chemical bond). vixra.org/pdf/1710.0326v2.pdf The Pauli exclusion principle and the chemical bond. The Pauli exclusion principle - this is the fundamental principle of quantum mechanics, which asserts that two or more identical fermions (particles with half-integral spin) can not simultaneously be in the same quantum state. Wolfgang Pauli, a Swiss theoretical physicist, formulated this principle in 1925 [1]. In chemistry exactly Pauli exclusion principle often considered as a ban on the existence of three-electron bonds with a multiplicity of 1.5, but it can be shown that Pauli exclusion principle does not prohibit the existence of three-electron bonds. To do this, analyze the Pauli exclusion principle in more detail. According to Pauli exclusion principle in a system consisting of identical fermions, two (or more) particles can not be in the same states [2]. The corresponding formulas of the wave functions and the determinant are given in the reference (this is a standard consideration of the fermion system), but we will concentrate our attention on the derivation: "... Of course, in this formulation, Pauli exclusion principle can only be applied to systems of weakly interacting particles, when one can speak (at least approximately on the states of individual particles) "[2]. That is, Pauli exclusion principle can only be applied to weakly interacting particles, when one can talk about the states of individual particles. But if we recall that any classical chemical bond is formed between two nuclei (this is a fundamental difference from atomic orbitals), which somehow "pull" the electrons one upon another, it is logical to assume that in the formation of a chemical bond, the electrons can no longer be regarded as weakly interacting particles . This assumption is confirmed by the earlier introduced notion of a chemical bond as a separate semi-virtual particle (natural component of the particle "parts" can not be weakly interacting). Representations of the chemical bond given in the chapter "The Principle of Heisenberg's Uncertainty and the Chemical Bond" categorically reject the statements about the chemical bond as a system of weakly interacting electrons. On the contrary, it follows from the above description that in the chemical bond, the electrons "lose" their individuality and "occupy" the entire chemical bond, that is, the electrons in the chemical bond "interact as much as possible", which directly indicates the inapplicability of the Pauli exclusion principle to the chemical bond. Moreover, the quantum-mechanical uncertainty in momentum and coordinate, in fact, strictly indicates that in the chemical bond, electrons are a system of "maximally" strongly interacting particles, and the whole chemical bond is a separate particle in which there is no place for the notion of an "individual" electron, its velocity, coordinate, energy, etc., description. This is fundamentally not true. The chemical bond is a separate particle, called us "semi-virtual particle", it is a composite particle that consists of individual electrons (strongly interacting), and spatially located between the nuclei. Thus, the introduction of a three-electron bond with a multiplicity of 1.5 is justified from the chemical point of view (simply explains the structure of the benzene molecule, aromaticity, the structure of organic and inorganic substances, etc.) is confirmed by the Pauli exclusion principle and the logical assumption of a chemical bond as system of strongly interacting particles (actually a separate semi-virtual particle), and as a consequence the inapplicability of the Pauli exclusion principle to a chemical bond. 1. Pauli W. Uber den Zusammenhang des Abschlusses der Elektronengruppen in Atom mit der Komplexstruktur der Spektren, - Z. Phys., 1925, 31, 765-783. 2. A.S. Davydov. Quantum mechanics. Second edition. Publishing house "Science". Moscow, 1973, p. 334. Heisenberg's uncertainty principle and chemical bond. For further analysis of chemical bond, let us consider the Compton wavelength of an electron: λc.е. = h/(me*c)= 2.4263 * 10^(-12) m The Compton wavelength of an electron is equivalent to the wavelength of a photon whose energy is equal to the rest energy of the electron itself (the standard conclusion is given below): λ = h/(m*v), E = h*γ, E = me*c^2, c = γ*λ, γ = c/λ E = h*γ, E = h*(c/λ) = me*c^2, λc.е. = h/(me*c) where λ is the Louis de Broglie wavelength, me is the mass of the electron, c, γ is the speed and frequency of light, and h is the Planck constant. It is more interesting to consider what happens to an electron in a region with linear dimensions smaller than the Compton wavelength of an electron. According to Heisenberg uncertainty in this area, we have a quantum mechanical uncertainty in the momentum of at least m*c and a quantum mechanical uncertainty in the energy of at least me*c^2 : Δp ≥ mе*c and ΔE ≥ me*c^2 which is sufficient for the production of virtual electron-positron pairs. Therefore, in such a region the electron can no longer be regarded as a "point object", since it (an electron) spends part of its time in the state "electron + pair (positron + electron)". As a result of the above, an electron at distances smaller than the Compton length is a system with an infinite number of degrees of freedom and its interaction should be described within the framework of quantum field theory. Most importantly, the transition to the intermediate state "electron + pair (positron + electron)" carried per time ~ λc.е./c Δt = λc.е./c = 2.4263 * 10^(-12)/(3*10^8) = 8.1*10^(-20) s Now we will try to use all the above-mentioned to describe the chemical bond using Einstein's theory of relativity and Heisenberg's uncertainty principle. To do this, let's make one assumption: suppose that the wavelength of an electron on a Bohr orbit (the hydrogen atom) is the same Compton wavelength of an electron, but in another frame of reference, and as a result there is a 137-times greater Compton wavelength (due to the effects of relativity theory): λc.е. = h/(me*c) = 2.4263 * 10^(-12) m λb. = h/(me*v)= 2*π*R = 3.31*10^(-10) m λb./λc.е.= 137 where R= 0.527 Å, the Bohr radius. Since the De Broglie wavelength in a hydrogen atom (according to Bohr) is 137 times larger than the Compton wavelength of an electron, it is quite logical to assume that the energy interactions will be 137 times weaker (the longer the photon wavelength, the lower the frequency, and hence the energy ). We note that 1 / 137.036 is a fine structure constant, the fundamental physical constant characterizing the force of electromagnetic interaction was introduced into science in 1916 year by the German physicist Arnold Sommerfeld as a measure of relativistic corrections in describing atomic spectra within the framework of the model of the N. Bohr atom. To describe the chemical bond, we use the Heisenberg uncertainty principle: Δx * Δp ≥ ћ / 2 Given the weakening of the energy interaction 137 times, the Heisenberg uncertainty principle can be written in the form: Δx* Δp ≥ (ћ * 137)/2 According to the last equation, the quantum mechanical uncertainty in the momentum of an electron in a chemical bond must be at least me * c, and the quantum mechanical uncertainty in the energy is not less than me * c ^ 2, which should also be sufficient for the production of virtual electron-positron pairs. Therefore, in the field of chemical bonding, in this case, an electron can not be regarded as a "point object", since it (an electron) will spend part of its time in the state "electron + pair (positron + electron)", and therefore its interaction should be described in the framework of quantum field theory. This approach makes it possible to explain how, in the case of many-electron chemical bonds (two-electron, three-electron, etc.), repulsion between electrons is overcome: since the chemical bond is actually a "boiling mass" of electrons and positrons, virtual positrons "help" overcome the repulsion between electrons. This approach assumes that the chemical bond is in fact a closed spatial bag (a potential well in the energy sense), in which "boiling" of real electrons and also virtual positrons and electrons occurs, and the "volume" of this potential bag is actually a "volume" of chemical bond and also the spatial measure of the quantum-mechanical uncertainty in the position of the electron. Strictly speaking, with such a consideration, the electron no longer has a certain energy, momentum, coordinates, and is no longer a "point particle", but actually takes up the "whole volume" of chemical bonding. It can be argued that in the chemical bond a single electron is depersonalized and loses its individuality, in fact it does not exist, but there is a "boiling mass" of real electrons and virtual positrons and electrons that by fluctuate change each other. That is, the chemical bond is actually a separate particle, as already mentioned, a semi-virtual particle. Moreover, this approach can be extended to the structure of elementary particles such as an electron or a positron: an elementary particle in this consideration is a fluctuating vacuum closed in a certain spatial bag, which is a potential well for these fluctuations. See pp. 88 - 104. Review. Benzene on the Basis of the Three-Electron Bond. (The Pauli exclusion principle, Heisenberg's uncertainty principle and chemical bond). vixra.org/pdf/1710.0326v2.pdf Bezverkhniy Volodymyr (viXra): vixra.org/author/bezverkhniy_volodymyr_dmytrovych

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Why atomic and mass number are integer

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The number of proton and electrons are not equal if it is an ion

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Atomic weight

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Nobody: Neutrons : 😐