Two elements 'A' and 'B' have atomic numbers 11 and 19 respectively. State their position in the Modern Periodic Table.
Which element has bigger atomic radius.
What is the nature of their oxides.

Explanation

To solve the question, we will break it down into three parts:

1. **Determine the position of elements A and B in the Modern Periodic Table.**
2. **Identify which element has a bigger atomic radius.**
3. **Discuss the nature of their oxides.**

### Step 1: Determine the position of elements A and B in the Modern Periodic Table.

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