Question

Isotones have:
1. same mass number but different atomic number
2. same atomic number but different mass number
3. same number of neutrons but different atomic number and mass numbers
4. same mass number, atomic number and number of neutrons

Answer 1

Correct Answer - Option 3 : same number of neutrons but different atomic number and mass numbers

CONCEPT:

• Isotones are atoms or nuclei which have an equal number of neutrons.
• Cl-37 and K39 both have the same number of neutrons.
• Isobars are Atoms of a chemical element that have the same atomic mass but a different atomic number.
• Isotopes are Atoms of a chemical element that have the same atomic number but a different atomic mass.

EXPLANATION:

• From the given definition of Isotones, we understand that isotones have the same number of neutrons but different atomic numbers and mass numbers.