Question

Identify the Elements Correctly Show by Decreasing Radii Size.

a) A. N3- > N
b) B. Cu2+ > Cu+
c) C. K+ > K
d) D. N > N3-

Answer 1

The size of an ion is determined by its charge. Cations with larger charges are smaller than cations with smaller charges. When comparing ions with the same charge, the ion with the highest nuclear charge is the smallest.

Step-by-step explanation:

The size of an ion is determined by its charge. Cations with larger charges are smaller than cations with smaller charges. When comparing ions with the same charge, the ion with the highest nuclear charge is the smallest. Therefore, let's analyze each option:

a) N3- > N: The ion with a larger negative charge, N3-, will have a larger radius than the neutral atom N.

b) Cu2+ > Cu+: The ion with a larger positive charge, Cu2+, will have a smaller radius than the ion with a smaller positive charge, Cu+.

c) K+ > K: The ion with a larger positive charge, K+, will have a smaller radius than the neutral atom K.

d) N > N3-: The neutral atom N will have a larger radius than the ion with a larger negative charge, N3-.

Therefore, the correct order of decreasing radii size is: d) N > N3- > a) N3- > N > c) K+ > K > b) Cu2+ > Cu+.