Question

question 16 (multiple choice worth 5 points) (82 0611 mc) which of the following correctly compares the radii of na and na⁺ na has a smaller radius than na⁺, because na has expanded its electron cloud. na has a larger radius than na⁺, because na has lost its outermost energy shell. na has a smaller radius than na⁺, because na⁺ has expanded its electron cloud. na has a larger radius than na⁺, because na⁺ has lost its outermost energy shell.

Explanation:

Sodium (Na) is a neutral atom. When it forms a sodium - ion (Na⁺), it loses one electron from its outermost energy shell. Losing the outermost energy shell reduces the size of the electron - cloud, making the ionic radius of Na⁺ smaller than the atomic radius of Na.

Answer:

D. Na has a larger radius than Na⁺, because Na⁺ has lost its outermost energy shell.