Br (Bromine) is a period 4 element in the same group as F.
The element in the same group as lithium (Group 1) and the same period as iron (Period 4) is potassium.
The element in period 4 group 2A is calcium (Ca).
The element in group 4 period 5 is Zirconium (Zr).
Germanium belongs to group IVA or group 14 and period 4
calcium
The element is krypton (Kr)
element K, or potassium
The element in Period 4 and Group 2 is Calcium, which has the chemical symbol Ca.
The element in period 4, group 7 of the periodic table is Manganese (Mn).
Element Name: Arsenic. Chemical Symbol: As.
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.
It is iron.