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  • Atomic number of a few elements are given below 10, 20, 7, 14(a)Identify the elements(b)Identify the Group number of these elements in the Periodic Table(c)Identify the Periods of these elements in the Periodic Table(d)What would be the electronic config

Atomic number of a few elements are given below 10, 20, 7, 14
(a) Identify the elements
(b) Identify the Group number of these elements in the Periodic Table
(c) Identify the Periods of these elements in the Periodic Table
(d) What would be the electronic configuration for each of these elements?
(e) Determine the valency of these elements

Answers (1)

Group Number is Electrons in the outer most shell plus 10 as long as the electrons in the outermost shell is greater than 2.
Period Number is the number of shells that are filled by electrons.
Valency is the least number of electrons an element loses or gains to have an inert gas configuration

Atomic Number

(d)

Electronic Configuration

(b)

Group Number

(c)

Period Number

 (e) Valency

(a) Element
10 2,8 (8+10=18) 2 0 Neon
20 2,8,8,2 2 4 2 Calcium
7 2,5 15 2 3 Nitrogen
14 2,8,4 14 3 4 Silicon

 

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