Ca for calcium.
There is no such element on the Periodic Table
Calcium -period 4 group 2a- chlorine group 7A -halogens-
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
Calcium -period 4 group 2a- chlorine group 7A -halogens-
There is no such element on the Periodic Table
element K, or potassium
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.