Question

1. Name the element with reference to the
elements of the modern periodic table.
(i) The number of electron shells in the elements
of period 3.
(ii) The noble gas having an electronic
configuration of 2, 8, 8.
(iii) The group whose elements show zero valency.
(iv) The non-metal in the period 3 having a
valency of 1.
(v) The alkali metal in the period 2.
(vi) The element in the period 3 which does not
form an oxide.
(vii) The element having maximum metallic
character in period 2.
(viii) The element having largest atomic size in
periods.
(ix) The more non-metallic element from the
elements S, P, CI and Ar.
(x) The noble gas having duplet arrangement of
electrons.
(xi) A light element of period 3 with a neutron/
proton ratio of about 1.​

Answer 1

1. 3

2. Argon

3. group 18

4. chlorine

5. lithium

6. sodium

7. lithium

8. The first elements of all periods

9. Chlorine

10. helium

11. sodium

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Answer 2

Answer:

1- 3 electron shells

2- argon

3- noble group

4- chlorine

5- lithium

6- argon

7- lithium

8- francium { in the periodic table }

9- argon

10- helium

11- Mg

Explanation:

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