Question

Give an example of compound, element and a mixture.

Answer 1

Hint : These are part of chemistry in everyday life. They also can be identified if one knows the periodic table. They exist in gases, solid and liquid form. They have their own symbols to distinguish their identity.

Complete Step By Step Answer:
Atoms when form only one type, they are called as elements. These simple forms exist, and cannot be broken down into any other substance. At present there are 118 elements known. But around 20% don’t exist in nature. Around 92 are naturally occurring elements and everything in the universe is made from these. They exist in gases, solid and liquid form. Elements are represented by symbols.
When different atoms combine forming and between them, they are known as compounds. Compounds are substances which are made from atoms of different elements joined by chemical bonds. They can be separated by chemical reaction. Some examples are HCl, NaCl, AgBr, etc.
a mixture is made of simply mixing together elements and of elements combination. There is no new formation or any chemical bond. Mixtures can be heterogeneous and homogeneous. Homogeneous mixture, the composition of mixture is the same throughout the process. In heterogeneous mixtures, the substance can exist in different phases.

Note :
Most of the mixture is present around us. For example the air we breathe. This is a mixture of different gases like oxygen and nitrogen and many more. A mixture can be separated using techniques such as filtration, chromatography, magnetisation, flotation, evaporation and distillation.