Question

Which among the following has largest size? (i) Li, K, Ba (ii) Na, Na+ (iii) O2―, Al3+ (iv) Cu, Ag, Au​

Answer 1

Answer:

2

Explanation:

na, na +. thanks or follow

Answer 2

(i) Ba , (ii) Na (iii) O²⁻ (iv) Au ≈ Ag

Explanation:

(i) The atomic radius in s block increases down the group and across the period (from left to right). Therefore, Ba is the largest in size.

(ii) The ionic size of the cation is smaller than the size of the neutral atom. Therefore, Na is the largest in size.

(iii) The ionic size of an anion is greater than the size of the cation. Therefore, O²⁻ is the largest in size.

(iv) The atomic size of the first transition series metals is less than the atomic size of the second and third transition series metals. The atomic size of the second and third transition series metals is nearly equal due to Lanthanoid contraction.