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The Fundamental Unit Of Life

Question
CBSEENSC9005260

A and B are two atoms in whose nuclei, the number of protons and neutrons are:

Atoms

Protons

Neutrons

A

6

6

B

6

7


Which element/elements do they represent and what is the relationship between them?

Solution

Mass number of A = 6 + 6 = 12

Mass number of B = 6 + 7 = 13

Atomic number is given by the number of protons present in atom. Since A and B have same number of proton number thus they having same atomic number but different mass number 12 and 13. They are atoms of carbon and are isotopes to each other.