Question

Please answer the attached question

Answer 1

a) atomic no. is 17

b) maximum capacity is 8

c) valency of element is 1

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Answer 2

Question :

Observe the diagram shown below and answer the following questions.

a) What is the atomic number of this element ?

b) What is the maximum capacity of the outermost shell ?

c) What is the valency of the element ?

Answer :

a) Atomic number of this element is 17. (Chlorine)

b) Maximum capacity of the outermost shell is 8.

c) Valency = 8 - 7 = 1

So, the valency is 1.

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First twenty elements :-

1. Hydrogen (H)
2. Helium (He)
3. Lithium (Li)
4. Beryllium (Be)
5. Boron (B)
6. Carbon (C)
7. Nitrogen (N)
8. Oxygen (O)
9. Fluorine (F)
10. Neon (Ne)
11. Sodium (Na)
12. Magnesium (Mg)
13. Aluminium (Al)
14. Silicon (Si)
15. Phosphorus (P)
16. Sulphur (S)
17. Chlorine (Cl)
18. Argon (Ar)
19. Potassium (K)
20. Calcium (Ca)