State the number of valence electrons, the group number and the period number of each
element.
Element Valence electrons Group number Period number
Sulphur
Oxygen
Magnesium
Hydrogen
Fluorine
Aluminium
Answers
Explanation:
Valency of First 30 Elements
The valency of the first 30 elements of the periodic table is given below.
Element Atomic
Number Valency
Valency of
Hydrogen 1 1
Valency of
Helium 2 0
Valency of
Lithium 3 1
Valency of
Beryllium 4 2
Valency of
Boron 5 3
Valency of
Carbon 6 4
Valency of
Nitrogen 7 3
Valency of
Oxygen 8 2
Valency of
Fluorineb 9 1
Valency of
Neon 1 0
Valency of
Sodium (Na) 11 1
Valency of
Magnesium (Mg) 12 2
Valency of
Aluminium 13 3
Valency of
Silicon 14 4