What do the group 17 elements become when they react with group 1 elements?

Answer 1

halogens have very low energy states and alkaline metals have very high (for the purposes of this I'm including hydrogen). the atom from column 1 is so energetic that it looses an electron, the one from column 17 with the with its low energy state gains an captures the electron. now both atoms are at low energies attract each other and form ionic bonds. in a compound the lower the energy state the more stable it is. so the ionic bond requires the energy to raise the alkaline metal to pre-bonded energy state.

Answer 2

most of the time elements of group one loose a valence electron making there oxidation number plus 1

Answer 3

It needs to gain 3 valence electrons, because 8 is usually the highest number that it can hold in order to be stable.

Answer 4

By combining.