Write the atomic number and electronic configuration of the following elements.

(i) Sodium

(ii) Chlorine

(iii) Neon

(iv) Magnesium

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Solution

(i) Sodium
Atomic number = 11
Electronic configuration = 2,8,1

(ii) Chlorine
Atomic number = 17
Electronic configuration = 2,8,7

(iii) Aluminium
Atomic number = 13
Electronic configuration = 2,8,3

(iv) Silicon
Atomic number = 14
Electronic configuration = 2,8,4

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Write the atomic number and electronic configuration of the following elements. (i) Sodium (ii) Chlorine (iii) Neon (iv) Magnesium

(i) Sodium Atomic number = 11 Electronic configuration = 2,8,1 (ii) Chlorine Atomic number = 17 Electronic configuration = 2,8,7 (iii) Aluminium Atomic number = 13 Electronic configuration = 2,8,3 (iv) Silicon Atomic number = 14 Electronic configuration = 2,8,4

Write the atomic number and electronic configuration of the following elements.

(i) Sodium

(ii) Chlorine

(iii) Neon

(iv) Magnesium

(i) Sodium
Atomic number = 11
Electronic configuration = 2,8,1

(ii) Chlorine
Atomic number = 17
Electronic configuration = 2,8,7

(iii) Aluminium
Atomic number = 13
Electronic configuration = 2,8,3

(iv) Silicon
Atomic number = 14
Electronic configuration = 2,8,4