How will you find the valency of chlorine Sulphur and magnesium.
Answers
If the number of electrons in the outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell. ... The distribution of electrons in chlorine, sulphur, and magnesium atoms are 2, 8, 7; 2, 8, 6 and 2, 8, 2 respectively.
Answer:
Through the atomic structure
Explanation:
You can check the valency by the atomic no.
Eg-
Sulphur - Atomic no - 15
- Electronic Configuration = 2,8,6
- Gaining of electrons is easier than losing
- So, as we know that 2,8,8,2 is the limit of filling shells
- So to complete it's third outermost shell it need 2 more electrons
- Therefore the valency will be 2
I am giving you short form to learner 20 elements
Learning formula Elements Electronic Configuration
1. H = Hi Hydrogen 1
2. He = Hello Helium 2
3. Li = Listen Lithium 2,1
4. B = B Berellium 2,2
5. B = B Boron 2,3
6. C = C Carbon 2,4
7. N = News Nitrogen 2,5
8. O = Of Oxygen 2,6
9. F = Florida Florine 2,7
10. Ne = Netherland Neon 2,8
11. Na = Nagaland Sodium 2,8,1
12. Mg = Meghalaya Magnesium 2,8,2
13. Al = All Aluminium 2,8,3
14. Si = Sinior Silicon 2,8,4
15. P = Public Phosphorus 2,8,5
16. S = School Sulphur 2,8,6
17. Cl = Closed Chlorine 2,8,7
18. A = At Argon 2,8,8
19. K = Kargil Potassium 2,8,8,1
20. C = Campus Calcium 2,8,8,2