Question

1
select the correct answer.
which of the following elements is an alkali metal?
a. potassium (k)
b. calcium (ca)
c. chromium (cr)
d. germanium (ge)

Explanation:

Alkali metals are Group 1 elements of the periodic table. Potassium (K) is in Group 1, while calcium (Ca) is an alkaline earth metal (Group 2), chromium (Cr) is a transition metal, and germanium (Ge) is a metalloid (Group 14).

Answer:

A. potassium (K)