Question

Give two examples:-
1. Polyatomic ions
2. Cations
3. Anions
4. Second period elements
5. Second period elements
6. Elements with chemical symbol having two alphabets
7. Divalent Elements
8. Polyatomic elements ​

Answer 1

Answer:

1. hydoxide, hydrogen carbonate

2. sodium, pottasium

3. chlorine, florine

4. BORON, ALLUMINIUM

5. MAGNESIUM, BERYLIUM

6. SAME AS 6

7. MAGNESIUM SODIUM

8. SULPHUR

Answer 2

Answer:

1.Carbonate (CO32-), sulphate (SO42-)

2.Calcium (Ca2+), Potassium (K+)

3.chlorine (Cl–), hydroxide (OH–).

4.Lithium. Beryllium.

5.Lead ,Plumbum

6.Beryllium ,Oxygen.

7.Water (H2O), ammonia (NH3)