Question

Describe the relationship between the three items in each of the following groups, and identify each item as an element, compound, or mixture:

a) Hydrogen, oxygen, and water
b) Nitrogen, oxygen, and air
c) Sodium, chlorine, and table salt
d) Carbon, water, and table sugar

Answer 1

Hydrogen and oxygen are elements, while water is a compound. Nitrogen and oxygen are elements, while air is a mixture. Sodium and chlorine are elements, while table salt is a compound. Carbon is an element, water is a compound, and table sugar is a compound.

Step-by-step explanation:

In group a), hydrogen and oxygen are both elements, while water is a compound. Hydrogen and oxygen are elements because they are made up of only one type of atom. Water, on the other hand, is a compound because it is made up of two different types of atoms, hydrogen and oxygen, that are chemically bonded together.

In group b), nitrogen and oxygen are elements, while air is a mixture. Nitrogen and oxygen are elements because they are made up of only one type of atom. Air, which is a mixture, is composed of different gases including nitrogen, oxygen, and other gases.

In group c), sodium is an element, chlorine is an element, and table salt is a compound. Sodium and chlorine are elements because they are each made up of only one type of atom. Table salt, also known as sodium chloride, is a compound because it is made up of two different types of atoms, sodium and chlorine, that are chemically bonded together.

In group d), carbon is an element, water is a compound, and table sugar is a compound. Carbon is an element because it is made up of only one type of atom. Water, which is made up of hydrogen and oxygen, is a compound. Table sugar, also known as sucrose, is a compound because it is made up of carbon, hydrogen, and oxygen atoms that are chemically bonded together.