Question

Which of the following elements has the largest atomic radius?

A. Potassium
B. Calcium
C. Cobalt
D. Nickel

Answer 1

"Nickel(Ni)" has the largest atomic radius.

Explanation:

Atomic number of Potassium (K) = 19

Atomic number of Calcium (Ca) = 20

Atomic number of Cobalt(Co) = 27 and

Atomic number of Nickel(Ni) = 28

Clearly, Nickel(Ni) has the largest atomic radius.

Hence, Nickel(Ni) has the largest atomic radius.

Answer 2

Answer:

Potassium is your answer.

Explanation:

Potassium- 243 pm

Calcium- 194 pm

Cobalt- 152 pm

Nickel- 149 pm