Question

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Answer 1

Answer:

Explanation:

@4

As Zinc is more reactive than Iron so it displaces iron from iron sulphate solution other examples are Aluminium , Magnesium,

@5 Metals

Li Lithium

4 Be Beryllium

11 Na Sodium

12 Mg Magnesium

Non metals

Members of halogen family

F Flourine

Cl Chlorine

Br Bromine

I Iodine

and O Oxygen

@6

1 Hydrogen 1s1

2 Helium 1s2

3 Lithium [He]2s1

4 Beryllium [He]2s2

5 Boron [He]2s22p1

6 Carbon [He]2s22p2

7 Nitrogen [He]2s22p3

8 Oxygen [He]2s22p4

9 Fluorine [He]2s22p5

10 Neon [He]2s22p6

valencies

Valency of Hydrogen 1 1

Valency of Helium 2 0

Valency of Lithium 3 1

Valency of Beryllium 4 2

Valency of Boron 5 3

Valency of Carbon 6 4

Valency of Nitrogen 7 3

Valency of Oxygen 8 2

Valency of Fluorine 9 1

Valency of Neon 10 0

the answer to the Ist question is attached in pic

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Answer 2

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Ionization energy, also called ionization potential, in chemistry and physics, the amount of energy required to remove an electron from an isolated atom or molecule.