Question

Classify each substance as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

1) Element
2) Compound
3) Homogeneous mixture
4) Heterogeneous mixture

Answer 1

Salt - Compound, Pure water - Compound, Soil - Heterogeneous mixture, Salt water - Homogeneous mixture, Pure air - Homogeneous mixture, Carbon dioxide - Compound, Gold - Element, Bronze - Homogeneous mixture

Step-by-step explanation:

When classifying substances as elements, compounds, homogeneous mixtures, or heterogeneous mixtures, it is important to consider their properties and composition.

1) Salt - Compound: Salt is made up of sodium and chlorine ions bonded together.

2) Pure water - Compound: Water is made up of hydrogen and oxygen atoms bonded together.

3) Soil - Heterogeneous mixture: Soil consists of a mixture of minerals, organic matter, water, and air, which can vary in composition.

4) Salt water - Homogeneous mixture: Salt water is a solution where salt is dissolved in water, resulting in a uniformly mixed solution.

5) Pure air - Homogeneous mixture: Pure air consists of a mixture of gases like nitrogen, oxygen, and carbon dioxide, which are uniformly distributed.

6) Carbon dioxide - Compound: Carbon dioxide is made up of carbon and oxygen atoms bonded together.

7) Gold - Element: Gold is a pure substance composed of only gold atoms.

8) Bronze - Homogeneous mixture: Bronze is an alloy made up of copper and tin atoms uniformly mixed together.