Bright Tutorials Bright Tutorials
ICSE Class 10 Physics Question 1 of 27

Solved Sample Paper 4 — Question 6

Back to all questions
6
Question

Question 1(vi)

Which of the following are isobars ?

  1. 612C^{12}_6\text{C} and 614C^{14}_6\text{C}
  2. 816O^{16}_8\text{O} and 1123Na^{23}_{11}\text{Na}
  3. 1123Na^{23}_{11}\text{Na} and 1122Mg^{22}_{11}\text{Mg}
  4. 1123Na^{23}_{11}\text{Na} and 1223Mg^{23}_{12}\text{Mg}
Answer

1123Na^{23}_{11}\text{Na} and 1223Mg^{23}_{12}\text{Mg}

Reason — Isobars are atoms having the same mass number but different atomic number. Hence, 1123Na^{23}_{11}\text{Na} and 1223Mg^{23}_{12}\text{Mg} are isobars.