Question

Give two examples of each of the following:
1. Polyatomic ions
2. Cations
3. Anions
4. Members of group 13
5. Second period elements
6. Divalent elements
7. Elements with chemical symbol having two alphabets
8. Polyatomic elements

Answer 1

Answer:

here is your answer

Explanation:

1. sodium hydroxide (NaOH) with OH- as the polyatomic anion, calcium carbonate (CaCO3), and ammonium nitrate (NH4NO3), which contains two polyatomic ions: NH+ and NO3-.

2. Some examples of cations are Calcium (Ca2+), Potassium (K+), hydrogen (H+).

3. examples of anions:

Bromide - Br -

Chloride - Cl -

4. boron (B), aluminium (Al),

5. The second period contains the elements lithium, beryllium,

6. Mg²+ ; Ca²+

7. Ca-calcium ,Cd-cadmium

8. Examples of polyatomic molecules are water (H2O), ammonia (NH3), and carbon dioxide (CO2).