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.
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.
Related Questions
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(b) What is the atomic number of element A?
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(d) What type of ion will be formed by an atom of element A? Write the symbol of the ion formed.
(e) What could element A be ?
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