Fluorine
Astatine is the 6th period halogen.
Nitrogen is not a halogen; nitrogen is a pnictide, group 15 and period 2 in the periodic table of Mendeleev.
CaF2
bromine
It is bromine. Edit: NO. It is NOT bromine. The third period halogen is chlorine (Cl). Bromine happens to be in period 4.
Astatine is the 6th period halogen.
Nitrogen is not a halogen; nitrogen is a pnictide, group 15 and period 2 in the periodic table of Mendeleev.
Iodine, element number 53 is the halogen (Group 17) element in period 5.
CaF2
chlorine
Iodine
bromine
It is bromine. Edit: NO. It is NOT bromine. The third period halogen is chlorine (Cl). Bromine happens to be in period 4.
This chemical element is astatine (At).
Bromine. :)
Chlorine, the halogen in period 3.
If you have a periodic table of the elements available, look at the second column from the right. Those elements are often referred to as "halogens". The "rows" in the periodic table are often referred to as the "periods". So the halogen from the third period would be "CL", or chlorine. Glad to help with your homework.