Name four metals and non-metals, and state
one major use of each

Metals

1) Sodium : It is used in the formation of table salt i. e. sodium chloride.

2) Copper : It is used in the wires of electricity due to better conduction.

3) Silver : It is used in wires and for making jewelry.

4) Aurum: It is used for making jewelry.

Non metals

1) Chlorine : It is used in the production of sodium chloride salt which is used in foods.

2) Flourine : It is used in making toothpaste.

3) Hydrogen : It is used in the formation of acids.

4) Oxygen : It is widely used in the production of steel and plastic.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)