Answer :
Answer:
The answer to your question is:
Explanation:
a. 6/3Li, 7/3Li
Protons Neutrons Electrons
⁶₃ Li 3 3 3
⁷₃ Li 3 4 3
b. 42/20Ca, 44/20 Ca
⁴² ₂₀ Ca 20 22 20
⁴⁴ ₂₀ Ca 20 24 20
c. 78/34Se, 80/34Se
⁷⁸₃₄Se 34 44 34
⁸⁰₃₄Se 34 46 34
The number of protons, neutrons, and electrons in each pair of isotopes is as follows on the basis of their atomic mass and the atomic number:
=> For option A.) - 6/3Li, 7/3Li
Lithium-6:
- The atomic mass is 6 and the atomic number is 3 which means the number of protons is 3 and the number of neutrons is 3 and as it has no charge then, the number of electrons is equal to the number of protons that is 3
- 3 protons, 3 electrons, and 3 neutrons.
Lithium 7:
- The atomic mass is 7 and the atomic number is 3 which means the number of protons is 3 and the number of neutrons is 4 and as it has no charge then, the number of electrons is equal to the number of protons that is 3.
- 3 protons, 3 electrons, and 4 neutrons.
On the same logic, we can get the number of protons, neutrons, and electrons in each pair of isotopes
=> For option B.) 42/20Ca, 44/20 Ca
Calcium-42:
- 20 protons, 20 electrons, and 22 neutrons.
Calcium-44:
- 20 protons, 20 electrons, and 24 neutrons.
=> For option C.) 78/34Se, 80/34Se
Selenium-78:
- 34 electrons, 34 electrons, and 44 neutrons.
Selenium-80:
- 34 protons, 34 electrons, and 46 neutrons.
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