Question

classify each of the following as element compound mixtures gold air marble milk sugar

Answer 1

gold is element
air is mixture
marble is compound
milk is compound
sugar is also a compound

Answer 2

Explanation:

An element is defined as the substance that contains atoms of only one type of element.

A compound is defined as the substance that contains atoms of different elements which chemically combine together in a fixed ratio by mass.

Mixtures are the substance in which two or more substances are mixed together but these are not chemically combined with each other.

Therefore, given substances are distinguished as follows.

• Gold - an element as it contains only atoms of gold.

• Marble - It has chemical formula as $CaCO_{3}$. Hence, it is a compound.

• Air - It contains dust, smoke, and smog particles along with various gases. Hence, it is a mixture.

• Milk - It contain water, lactose, fats, proteins etc. Hence, it is a mixture.

• Sugar - Its molecular formula is $C_{12}H_{22}O_{11}$. Hence, it is a compound.