Talk:Mass number

Physics High‑importance

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Chemistry High‑importance

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Chemistry is integral to our lives

when you wonder what the earth,sky or ocean is made of, you are thinking about chemistry. when you wonder a rain puddle dries up, how a car gets energy from gasoline, or how your body gets energy from the food you eat, you are again thinking about chemistry. —Preceding unsigned comment added by 99.181.102.46 (talk) 00:28, 4 April 2009 (UTC)[reply]

How 154.161.25.175 (talk) 18:36, 12 November 2024 (UTC)[reply]

umm...sayyour not given the mass number of a specific element.only the atomic number is given.so...without the mass number gow do you figure out the no. of neutrons???in other works how do you figure the mass number without them giving it to u. —Preceding unsigned comment added by Shani199310 (talk • contribs) 22:40, 11 May 2009 (UTC)[reply]

Carbon-14 decay and the electron

Does it transform two particles to electron, or should the electron be removed:

¹⁴
₆C
→ ¹⁴
₇N
+
e⁻
+
ν
_e

( ¹⁴
₇N
have 7 electrons or it should have a charge, and carbon has 6 electrons. 87.59.205.99 (talk) 08:00, 3 February 2012 (UTC)[reply]

This is a nuclear equation so the C nucleus has charge +6 and the N nucleus has charge +7. However the convention for nuclear equations is to show the charges only as atomic numbers, here the left subscripts 6 and 7. Dirac66 (talk) 14:42, 3 February 2012 (UTC)[reply]

A propos of this, is

²³⁸
₉₂U
→ ²³⁴
₉₀Th
+ ⁴
₂He²⁺

- showing the charge on the alpha particle, correct as a nuclear equation, or should it simply be

²³⁸
₉₂U
→ ²³⁴
₉₀Th
+ ⁴
₂He

?

--Keith Edkins ( Talk ) 09:59, 24 January 2024 (UTC)[reply]

Your second equation is correct. Again the atomic number 2 shows the nuclear charge, without considering external electrons or their absence. (If we did, we would also have to write +92 for the U nucleus and +90 for the Th nucleus. But again these values are already implied by the atomic numbers.) Dirac66 (talk) 13:22, 24 January 2024 (UTC)[reply]

Why so complex?

Wikipedia is a "free encyclopedia that anyone can edit". It is available to people all over the world. But why is it so hard to read some pages? I'm a 6th grader, but still, there is just too much technical jargon for this to be helpful for my homework. Can someone please simplify this? -Nathan — Preceding unsigned comment added by 76.24.133.63 (talk) 21:32, 20 November 2013 (UTC)[reply]

I half "second" this thought. Pre-med, studying for the MCAT here (so pretty good command over most sciences), and I'm mostly hung up on the line " the mass number A is identical with the baryon number B as of the nucleus as of the whole atom or ion." The "as of ... as of" is not a common grammatical construction that makes much sense here, so, akin to Nathan's question/concern above, I'm struggling to make sense of it.

Could someone with a better technical command of physics and baryons reword this so the "as of" construction doesn't obscure meaning/clarity?? PolymathGirl (talk) 18:38, 4 June 2017 (UTC)[reply]

I agree, made too complex. It should describe: A = Z + N. -DePiep (talk) 19:15, 4 June 2017 (UTC)[reply]

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Strange grammar

In the first paragraph, the phrase "as of the nucleus as of the whole atom or ion" appears. [Edit by user 2a00:23c4:7c87:4f00:8544:fa0c:4267:b750]

I have reworded this to "of the nucleus (and also of the whole atom or ion)." Dirac66 (talk) 22:16, 3 December 2020 (UTC)[reply]

Number of mass

1- Hydrogen ( h) — Preceding unsigned comment added by 103.39.129.211 (talk) 10:29, 17 May 2022 (UTC)[reply]