Question

Q1. Write down the difference between Compound and Mixture.
Q2. Write down the symbol of the following:-
a. Calcium e. Silver
b. Aluminium f. Tungsten
c. Potassium g. Hydrogen
d. Sodium h. Helium
Q3.Write down the chemical formula of the following:-
a. Magnesium hydroxide e. Sodium oxide
b. Carbon tetrachloride f. Calcium chloride
c. Barium sulphate g. Calcium carbonate
d. Aluminium oxide h. Aluminium sulphate
Q4. Draw and write the electronic configuration of the following:-
a. Sodium e. Phosphorus
b. Calcium f. Potassium
c. Zinc g. Argon
d. Helium h. Chlorine

Q5. Convert the following statement into chemical equation and
balance them also:-
a. Sodium reacts with oxygen to form sodium oxide.

b. Magnesium oxide reacts with water to form Magnesium
hydroxide.
c. Potassium hydroxide reacts with sulphuric acid to form Potassium
sulphate and water.
d. Sodium chloride reacts with silver nitrate to form silver chloride
and sodium nitrate.

Answer 1

Answer:

1)A compound is the substances that are formed by combining two are more chemical elements. A mixture is a substance created from two or more matter that can be separate with the help of physical methods. Compound substances are always homogeneous in nature.

2)Potassium

Sodium

Hydrogen

Calcium

Aluminium

Magnesium

Zinc

Chlorine

Sulphur

Nitrogen

Oxygen

Ammonium

Bicarbonate

Nitrate

Bisulphate

Bisulphite

Hydroxide

Carbonate

Sulphate

Sulphite

3)(a) Magnesium chloride = MgCl

2

(b) Calcium oxide = CaO

(c) Copper nitrate = Cu(NO

3)

(d) Aluminium chloride = AlCl

3

(e) Calcium carbonate = CaCO

4)Hydrogen [[p =1]]

Boron [[p=5]]

Nitrogen [[p=7]]

Neon [[p=10]]

Magnesium [[p=12]]

Aluminium [[p=13]]

Sulphur [[p=16]]

Argon [[p=18]]

Potassium [[p=19]]

Calcium [[p=20