As
==
Arsenic. This element is a metaloid.
Group 5 (a)
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
Scandium is considered a transition metal; group 3, period 4 in the periodic table of Mendeleev.
Zinc is in group 12.
Sulphur belongs to group-16. It has 6 valence electrons.
Group 7 of the periodic table.
Group 16
group 4
Group 3.
alkali
Group 5 (a)
Phosphorous belong to group 15 of the periodic table.
Group 2
Group 2
The noble gases belong to Group 18 of the periodic table.
Oxygen is the first element in group 16 of the periodic table
Scandium and Yttrium