Two elements M and N belonge to group I and II respectively and are in the same period of the periodic table. How do the following properties of M and N vary ?
Their valencies in forming oxides

Explanation

To determine how the valencies of elements M and N, which belong to Group I and Group II respectively, vary in forming oxides, we can follow these steps:

### Step 1: Identify the Groups
- Element M belongs to Group I of the periodic table.
- Element N belongs to Group II of the periodic table.

### Step 2: Understand Valency
- Valency is defined as the combining capacity of an element with other elements. It indicates how many electrons an atom can lose, gain, or share when it forms chemical bonds.
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