Sulphide

Sulphite

Sulphate

Bisulphide

Cuprum

Stibium

Argentum

Hydrargyrum

All matter consists of indivisible particles called atoms.

Atoms cannot be created or destroyed.

Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.

The electron is the smallest unit of matter that can take part in a chemical reaction.

Phosphorus

Sulphur

Hydrogen

Mercury

International Understanding of Physics and Chemistry

International Union of Pure and Applied Chemistry

Indian Union of Pure and Applied Chemistry

International Union of Permutation and Combination

10⁵

10¹⁰

10¹⁵

10²⁰

$$\frac{1}{14}\left(Mass\ of\ C^{14}\right)$$  

$$\frac{1}{12}\left(Mass\ of\ C^{12}\right)$$  

$$\frac{1}{16}\left(Mass\ of\ O^{16}\right)$$  

$$\frac{1}{13}\left(Mass\ of\ C^{13}\right)$$  

1.66 x 10^-24 Kg

1.66 x 10^-24 g

1.66 x 10^-27 g

1.66 x 10^-21 Kg

30 g

30 u

30

None

35.5 u

35.5

37 u

37

3

4

5

6

valency

valence electrons

charge

oxidation number

6.022 x 10²¹

6.022 x 10²²

6.022 x 10²³

6.023 x 10²²

Al₂(SO₄)₃

Al₃(SO₄)₂

AlSO₄

Al(SO₄)₂

NH₄Cr₂O₇

(NH₄)₂Cr₂O₇

(NH₄)₃Cr₂O₇

NH₄(Cr₂O₇)₂

53 g

47 g

11 g

14 g