Question

1. we used __________ to represent an element.

Answer 1

Answer:

1. we used chemical formula to represent an element.

choice a. is correct

2. the chemical formula of a molecule shows the number and kind of atoms contained in the molecule.

choice c. is correct

3. which of the following is an atom?

= K [Potassium]

choice a. is correct

4. which of the following is a molecule?

= CO [Carbon Monoxide]

choice d. is correct

Answer 2

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

1. we used Symbol to represent an element.

2. The chemical formula of a molecule shows the number and kind of atoms contained in the molecule.

3. K (potassium) is the atom among the given choices.

4. CO (carbon - monoxide) is the molecule among given choices.