Question

l in the blanks "1. Elements can be classified as ……… and ……. . 2. Two examples of metals which are poor conductors of heat are ………, ……… . 3. Two metals which melt when kept on the palm are ………, ……… . 4. A non-metal which is a good conductor of electricity is ……… . 5. Metals can form positive ions by ……… . 6. A non-metal which is lustrous is ……… . 7. A metal which burns in air with a dazzling white flame is ……… . 8. Metals above hydrogen in the activity series can displace ……… from dilute acids. 9. The extraction of metals from their ores and then refining them for use is known as ……… . 10. ……… is an allotroph of carbon and is the hardest natural substance. 11. Metals which are so soft that they can be cut with a knife are ………, ……… 12. Metal oxides ……… and ……… dissolve in water to form alkalis."​

Answer 1

Explanation:

Elements can be classified as ferrous or non ferrous

Answer 2

$\sf \frak \red{Answer:-}$

1. metals, non metals
2. lead, mercury
3. gallium, caesium
4. graphite
5. loss electron
6. iodine
7. magnesium
8. hydrogen
9. metallurgy
10. diamond
11. Sodium
12. sofium oxide, potassium oxide