Question

Structures of nuclei of three atoms A, B and Care given below:
A has 90 protons and 146 neutrons
B has 92 protons and 146 neutrons
Chas 90 protons and 148 neutrons
Based on the above data, which of these atoms are isotopes and which are isobars?
(1) A and B are isotopes; A and C are isobars
(2) A and Care isotopes; B and C are isobars
(3) A and C are isotopes; A and B are isobars
(4) Band C are isobars; A and B are isotopes​

Answer 1

Answer:

Explanation:

A has mass no.236 and atomic number90

B has mass no.238 and atomic number92

C has mass no. 238 and atomic number 90

Hence, A and Care isotopes

A and C are isobars

Isobars have same mass number

Isotopes have same atomic number