Question

Composition of the nuclei of two atomic species A and B are given as under :

Choose the correct relationship between A and B ?

• A. A and B are Isotopes
• B. A and B are Isobars
• C. A and B are Isotones
• D. A and B are Isomers

Hint:

Remember these definitions for atomic species:
Isotopes: Same protons, different neutrons.
Isobars: Different protons, same total mass (protons + neutrons).
Isotones: Different protons, same neutrons. Focus on the number of protons and neutrons to classify them correctly.

Answer 1

The Correct Option is A

Step 1: Understand the definitions of isotopes, isobars, isotones, and isomers.
Isotopes: Atoms of the same element that have the same number of protons but different numbers of neutrons. Consequently, they have the same atomic number but different mass numbers.
Isobars: Atoms of different elements that have the same mass number (sum of protons and neutrons) but different atomic numbers (different number of protons).
Isotones: Atoms of different elements that have the same number of neutrons but different numbers of protons.
Isomers: Compounds with the same molecular formula but different arrangements of atoms in space. This term is used in organic chemistry and refers to molecules, not atomic species in this context. Step 2: Analyze the composition of atomic species A and B.
Species A:
Protons = 6
Neutrons = 6
Mass number (Protons + Neutrons) = 6 + 6 = 12
Species B:
Protons = 6
Neutrons = 8
Mass number (Protons + Neutrons) = 6 + 8 = 14 Step 3: Compare A and B based on their composition.
Both A and B have the same number of protons (6). This means they are atoms of the same element (Carbon, since atomic number 6 is Carbon).
A has 6 neutrons, while B has 8 neutrons. They have different numbers of neutrons.
A has a mass number of 12, while B has a mass number of 14. They have different mass numbers. Step 4: Choose the correct relationship.
Since A and B have the same number of protons (same atomic number) but different numbers of neutrons (different mass numbers), they are isotopes. $$(1) A and B are Isotopes$$