Question

Complete the following co-relation:
(2) 1.Water: Compound : : Milk: ?
2. Valency of Sodium : 1 : : Valency ofOxygen:?​

Answer 1

Answer:

1. mixture

2. valency of oxygen is -2

Answer 2

Milk - Colloid

Valency of Oxygen is 2

Explanation:

1. Milk - Colloid

• Colloid is a heterogenous mixture, their particle size is intermediate between those of a solution and a suspension.

• Milk is a mixture of water, fat and solids, hence milk is an example of colloidal solution.

2. Oxygen valency - 2

• The atomic number of oxygen is 8
• In the first shell there will be 2 electrons
• In the second shell there will be 6 electrons
• The valency of an element is calculated by subtracting the total number of electrons minus total number of electrons in the outer most shell.