Question

2. Which of the following is an element?
(b) Salt
(a) Calcium
(c) Charcoal
(d) Carbon dioxide​

Answer 1

(a) Calcium

Explanation:

I guess it is Calcium

Answer 2

Answer:

calcium

Explanation:

it is so because salt is made of NaCl

while charcoal is a form of carbon and carbon dioxide is a gas. so it will be calcium