Question

how elements are classified

Answer 1

elements are classified accordin to their physical or chemical properties
mainly of it is their atomic masses

Answer 2

Answer:

Elements are classified as follows:

(1) Metals :

(i) They have a lustre.

(ii) They conduct heat and electricity.

(iii) They can be drawn into wire hence they are ductile.

(iv) They can be hammered into thin sheets hence they are malleable.

For example, gold, silver, etc.

(2) Non-metals :

(i) They have no lustre.

(ii) They are poor conductors of heat and electricity

(iii) They are not ductile and malleable. For example, iodine, carbon, etc.

(3) Metalloids : These elements have intermediate properties between metals and non-metals.For example, As, Si, etc.