How to take out the valency of the first 20 elements of the periodic table ? What is poly-atomic ?
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In order to take out the valency of the first 20 elements u need to know their atomic number....For e.g.- Na(sodium)-atomic no-11- 2,8,7...so valency - 8-7 =1..
u also need to know about the total no of electrons that a shell can accommodate ...hope it helps
u also need to know about the total no of electrons that a shell can accommodate ...hope it helps
tanusharma15h:
Thanks
Really helpful ☺
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What is valency ?
=> Valency is the combining capacity of an atom with another atom (s) .
This is normally given by the number of Valence electrons or by 8 minus the Valence electrons (Only when the number of Valence electrons is more than 4) .
Valency of first 20 elements is given below.
1) Hydrogen (H) = 1
2) Helium (He) = 0
3) Lithium (Li) = 1
4) Beryllium (Be) = 2
5) Boron (B) = 3
6) Carbon (C) = 4
7) Nitrogen (N) = 3
8) Oxygen (O) = 2
9) Fluorine (F) = 1
10) Neon (Ne) = 0
11) Sodium (Na) = 1
12) Magnesium (Mg) = 2
13) Aluminium (Al) = 3
14) Silicon (Si) = 4
15) Phosphorus (P) = 3, 5
16) Sulphur (S) = 2
17) Chlorine (Cl) = 1
18) Argon (Ar) = 0
19) Potassium (K) = 1
20 ) Calcium (Ca) = 2
#Be Brainly !!
=> Valency is the combining capacity of an atom with another atom (s) .
This is normally given by the number of Valence electrons or by 8 minus the Valence electrons (Only when the number of Valence electrons is more than 4) .
Valency of first 20 elements is given below.
1) Hydrogen (H) = 1
2) Helium (He) = 0
3) Lithium (Li) = 1
4) Beryllium (Be) = 2
5) Boron (B) = 3
6) Carbon (C) = 4
7) Nitrogen (N) = 3
8) Oxygen (O) = 2
9) Fluorine (F) = 1
10) Neon (Ne) = 0
11) Sodium (Na) = 1
12) Magnesium (Mg) = 2
13) Aluminium (Al) = 3
14) Silicon (Si) = 4
15) Phosphorus (P) = 3, 5
16) Sulphur (S) = 2
17) Chlorine (Cl) = 1
18) Argon (Ar) = 0
19) Potassium (K) = 1
20 ) Calcium (Ca) = 2
#Be Brainly !!
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