Chemistry
Atom A is represented as 20982A, atom B as 20983B and atom C as 21182C
(a) How many electrons, protons and neutrons do A, B and C have?
(b) Which two atoms have the different number of nucleons?
(c) Name the term which can be used for A and C atoms.
(d) Define the term mentioned in part (c) above.
Atomic Structure
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Answer
(a)
| Atom | Electron (e) | Proton (p) | Neutron (n = mass number - p) |
|---|---|---|---|
| 20982A | 82 | 82 | 209 - 82 = 127 |
| 20983B | 83 | 83 | 209 - 83 = 126 |
| 21182C | 82 | 82 | 211 - 82 = 129 |
(b) A and C have different number of nucleon, because the number of protons is same in both but number of neutrons are different.
(c) Isotopes
(d) Isotopes are atoms of the same element having the same atomic number but different mass numbers.
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