Question

Oxygen, fluorine,neon, sodium, magnesium, aluminium, silicon. tell me the symbol and atomic number now please​

Answer 1

symbol - O, F, Ne, Na, Al, Si

atomic number - 8, 9, 10, 11, 13, 14

Answer 2

Answer:

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Refer to the Attachment:-

Oxygen (O) :-

valancy:- 2

Atomic mass:- 16

Atomic number:-8

Flourine (F) :-

valancy:- 1

Atomic mass :- 19

Atomic number:-9

Neon (Ne):-

valancy:- 0

Atomic Mass :-20

Atomic number:- 10

Sodium (Na) :-

valancy:- 1

Atomic Mass:- 23

Atomic number:- 11

Magnesium (Mg) :-

valancy:- 2

Atomic Mass:- 24

Atomic number:- 12

Aluminum (Al) :-

valancy:- 3

Atomic Mass :- 27

Atomic number:-13

Silicon (Si):-

valancy:- 4

Atomic Mass:- 28

Atomic number:- 14