2. What is the formula of the compound formed by the element in group 1A and period 3 and the element in group VIA and period 2 of the periodic table?

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Solution

In group 1A and period 3, the element is Sodium (Na), and the element in the group VIA and period 2, the element is Oxygen (O).
The formula becomes Sodium oxide (Na₂O) since the electrovalency of sodium is 1 and the electrovalency of oxygen is 2.

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2. What is the formula of the compound formed by the element in group 1A and period 3 and the element in group VIA and period 2 of the periodic table?

In group 1A and period 3, the element is Sodium (Na), and the element in the group VIA and period 2, the element is Oxygen (O).The formula becomes Sodium oxide (Na2O) since the electrovalency of sodium is 1 and the electrovalency of oxygen is 2.

In group 1A and period 3, the element is Sodium (Na), and the element in the group VIA and period 2, the element is Oxygen (O).
The formula becomes Sodium oxide (Na₂O) since the electrovalency of sodium is 1 and the electrovalency of oxygen is 2.