Question

fluorine (f) and bromine (br) are in the same group on the periodic table. how do atoms of these elements compare when they form bonds?
both a fluorine atom and a bromine atom lose one electron, and both atoms become stable.
a fluorine atom becomes stable by losing one electron, but a bromine atom cannot become stable by losing only one electron.
both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.
a fluorine atom becomes stable by gaining one electron, but a bromine atom cannot become stable by gaining only one electron.

Explanation:

Fluorine (F) and bromine (Br) are in Group 17 (halogens) of the periodic table. Halogens have 7 valence electrons. To achieve a stable electron configuration (a full outer shell, usually 8 electrons), they tend to gain 1 electron. So, both F and Br atoms will gain one electron to become stable.

Answer:

C. Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.