Elements

The word element was introduced for the first time by Lavoisier a French chemist.

According to him-

An element is the simplest or basic form of pure substance which cannot be broken into anything simpler than it by physical or chemical methods.

For Example:

• Hydrogen, carbon, oxygen, nitrogen, sulphur, copper, silver, gold etc.

Types of elements:

1. Metals

2. Non-metals

3. Metalloids

• There are 118 elements known at present. Out of the known elements only about 92 have been found to be present in nature and the rest have been synthesized by scientists.
• Some elements are solids, some elements are liquids other elements are gases at the room temperature.
• For example, sodium and carbon are solids; mercury and bromine elements are liquids, hydrogen and oxygen elements are gases, at the room temperature.