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group 1 , group 7 , group 0
alkali metal
group 1
soft low density low melting point
group 1
more reactive and decrese in melting and boiling point as you go down
group 1
halogens
group 7
diatomic molecules
group 7
covelent bond
group 7
reactivity decrease +increase in boiling point and melting point as you go down
group 7
wich groups ions are called halide
goup 7
what is a displacement reaction
more reactive always displaces less reactive
colorless gas , inert , single atoms , non flameble
group 0
boiling pointr increase as you go down
group 0