Question

what are the exceptions in the properties of metals and non metals??(physical)

Answer 1

1. Metals have lustre, while non-metals graphite and iodine also have metallic shine
2. Sodium and potassium have low melting points. Mercury is liquid at room temperature. Carbon, a nonmetal, has high melting point. Bromine, a nonmetal, is liquid at room temperature.
3. Alkali Metals have high density, but Lithium density is 0.53. Iodine, a nonmetal, has density of 4.9
4. Graphite and carbon in gas form are good conductor of electricity. Metals Bismuth and lead are not good conductors.
5. Diamond,a nonmetal is the hardest material and. Potassium and sodium are so soft, they can be cut with knife.
6. All metals do not release hydrogen on acting with acids- gold, silver, copper, platinum.
7. If we consider minerals and compounds in nature, mica is very good conductor of heat, but bad conductor of electricity. As a rule, good conductors of electricity are also good conductors of heat.
8. When metal is hit , it produces sound. Mercury is exception.
9. All metals are malleable. Mercury is exception.
10. Metals are insoluble in water, but sodium and potassium react violently to form soluble hydroxides on contact with water.