Explanation:
Which group tends to form 1+ ions;
This is the group 1 elements. They easily lose their one valence electron to achieve a table octet configuration. Also known as Alkali metals
Which group tends to form 2+ ions;
This is the group 2 elements, also known as alkali earth metals.
Which group tends to form 1- ions;
This is the group 7 elements. They gain one electron to achieve an octet configuration. They are the Halogens
Which group tends not to form ions or react;
This is the group 8 elements also known as the Noble gas elements. They already have a stable octet configuration so there's no need to react or form ions.