CBSE Class 10 Answered

Metals

1. Most of the elements known to us are metals.
 Examples: Gold, silver, platinum, iron, tin, calcium, nickel
2. Of the 118 elements in the periodic table, about 91 are metals.
3. Metals are hard, lustrous materials which are good conductors of heat and electricity.
4. They are malleable and ductile.

Non-metals

1. Non-metals are fewer in comparison to metals. Excluding the inert gases, there are only eleven non-metals known to us. Non-metals also play a vital role in everyday life.

2. They are further divided into halogens and noble gases.

3. Halogens: Fluorine, chlorine, bromine, iodine

4. Noble gases: Helium, neon, argon, krypton, xenon, radon