Ca for calcium.
Calcium -period 4 group 2a- chlorine group 7A -halogens-
There is no such element on the Periodic Table
Germanium belongs to group IVA or group 14 and period 4
The element is krypton (Kr)
Ca for calcium.
Br (Bromine) is a period 4 element in the same group as F.
There is no element with 28 protons in group 4. I think you are getting confused with group 4 and PERIOD 4. In period 4, the element with 28 protons is Nickel.
Germanium, belongs to period 4, group IVA (or group 14)
calcium
There is no such element on the Periodic Table
element K, or potassium
Calcium -period 4 group 2a- chlorine group 7A -halogens-
Chromium is the element in period 4 and group 6.
Germanium belongs to group IVA or group 14 and period 4
Krypton.
It is iron.