Question

Which of the following elements is a nonmetal?

a. U
b. O
c. Pb
d. Na
e. Mg

Answer 1

O is a nonmetal

Step-by-step explanation:

Mg (magnesium) is a metal.

Na (sodium) is a metal

Pb (lead) is a metal

U (uranium) is a metal

O (oxygen) is a gas. O is not a metal