chemical compounds

the valency of ammonium group is :

• -1

• -2

• +1

• +3

name this compound

• ammonium phosphate

• ammonium sulfate

• aluminium phosphate

• aluminium sulfate

the charge of ions is ................... respectively:

• +3 / -2

• +2 / -3

• +3 / -3

• -2 / +3

the atomic group reacts as :

• each atom as it self individual

• as one group

• as one ion

• as one element

acids release ........................ ion when dissolves in water:

• OH-

• NH4+

• H+

• H2

bases make the litmus paper color changed to ...... color:

• red

• green

• black

• blue

the phosphate ion has charge equals ......:

• +2

• +3

• -8

• -3

magnesium ion is :

• monovalent

• divalent

• trivalent

• has no charge

the compound name is:

• lithium hydroxalate

• lithium oxide

• lithium bihydroxide

• lithium hydroxide

the electrons in the outer most shell called valency electrons

• true

• false