What would be the atomic number of the next (i) alkali metal (ii) alkaline earth metal (ii) halogen and (iv) inert gas If discovered in future ?

Explanation

To determine the atomic numbers of the next alkali metal, alkaline earth metal, halogen, and inert gas, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Current Elements in Each Group:**
- **Alkali Metals:** The alkali metals are in Group 1 of the periodic table. The last known alkali metal is Francium (Fr), which has an atomic number of 87.
- **Alkaline Earth Metals:** The alkaline earth metals are in Group 2. The last known alkaline earth metal is Radium (Ra), which has an atomic number of 88.
- **Halogens:** The halogens are in Group 17. The last known halogen is Tennessine (Ts), which has an atomic number of 117.
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