H F acid fluorhidric
molecula se formeaza prin legatura covalenta polara H-F
H are valenta 1 , Fare valenta 1
H Cl acid clorhidric
leg. covalenta polara H-Cl
H are valenta 1 ,Cl are val.1
HBr acid bromhidric
leg. cov polara H-Br
H valenta 1, Br valenta 1
H I acid iodhidric
leg. cov . polara H-I
au valenta 1