Question

Identify each item as either an element or a compound. carbon (C) carbon dioxide (CO2) hydrogen (H) sodium chloride (NaCl)

Answer 1

Answer:

Carbon-element

Carbon dioxide-compound

Hydrogen-Element

Sodium chloride-Compound

Explanation:

Element:It is a substance whose atoms all have the same number of protons.

It is chemically simplest substance and it can not be broken in smallest particle by chemical reactions.

Compound:It is  substance which  consist of two or more than two elements.

1.Carbon (C)

Using definition of element

Carbon is an element.

2.Carbon dioxide

Carbon dioxide is  a compound because it consist of carbon and oxygen .

3.Hydrogen

It is an element because it cannot be broken down in small particles by chemical reaction.

4.NaCl

It is a compound because it consist of sodium and  Cl -atom

Answer 2

Carbon- element
Carbon dioxide- compound
Hydrogen- element
Sodium- element
Sodium chloride- compound