Question

valency of 30 elements.......
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Answer 1

$\begin{array}{| c | c | c |}\cline{1-3} \bf Atomic\:No. & \bf Elements & \bf Valency \\ \cline{1-3} 1 &\sf Hydrogen & 1 \\ \cline{1-3} 2 &\sf Helium & 0 \\ \cline{1-3} 3 &\sf Lithium & 1 \\ \cline{1-3} 4 &\sf Berrylium & 2 \\ \cline{1-3} 5 &\sf Boron & 3 \\ \cline{1-3} 6 &\sf Carbon & 4 \\ \cline{1-3} 7 &\sf Nitrogen & 3 \\ \cline{1-3} 8 &\sf Oxygen & 2 \\ \cline{1-3} 9 &\sf Flourine & 1 \\ \cline{1-3} 10 &\sf Neon & 0 \\ \cline{1-3} 11 &\sf Sodium & 1 \\ \cline{1-3} 12 &\sf Magnesium & 2 \\ \cline{1-3} 13 &\sf Aluminium & 3 \\ \cline{1-3} 14 &\sf Silicon & 4 \\ \cline{1-3} 15 &\sf Phosphorus & 3 \\ \cline{1-3} 16 &\sf Sulphur & 2 \\ \cline{1-3} 17 &\sf Chlorine & 1 \\ \cline{1-3} 18 &\sf Argon & 0 \\ \cline{1-3} 19 &\sf Potassium & 1 \\ \cline{1-3} 20 &\sf Calcium & 2 \\ \cline{1-3} 21 &\sf Scandium & 3 \\ \cline{1-3} 22 &\sf Titanium & 4 \\ \cline{1-3} 23 &\sf Vanadium & 5,4 \\ \cline{1-3} 24 &\sf Chromium & 2 \\ \cline{1-3} 25 &\sf Manganese & 7,4,2 \\ \cline{1-3} 26 &\sf Iron & 2,3 \\ \cline{1-3} 27 &\sf Nickel & 3,2 \\ \cline{1-3} 28 &\sf Cobalt & 2 \\ \cline{1-3} 29 &\sf Copper & 2,1 \\ \cline{1-3} 30 &\sf Zinc & 2 \\ \cline{1-3}\end{array}$

Answer 2

Answer:

Elements

Hydrogen

Helium

Lithium

Berrylium

Boron

Carbon

Nitrogen

Oxygen

Flourine

Neon

Sodium

Magnesium

Aluminium

Silicon

Phosphorus

Sulphur

Chlorine

Argon

Potassium

Calcium

Scandium

Titanium

Vanadium

Chromium

Manganese

Iron

Nickel

Cobalt

Copper

Zinc

Valency

1

0

1

2

3

4

3

2

1

0

1

2

3

4

3

2

1

0

1

2

3

4

5,4

2

7,4,2

2,3

3,2

2

2,1

2