Question

An element in a group IIA would form a _______ Ion while an element in group VIIA Would form a(n)

Answer 1

IIA forms Cations with 2+ charge because they are "Paws-itive" and the VIIA forms an Anion with 1- charge. 

Btw, this is chemistry not biology- just for future references. 

Answer 2

Answer:

positive, negative

Explanation:

The elements of group IIA in the periodic table are called Alacaline Earth Metals. This family is composed of the following metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). The radio element has a very short average lifetime.

These elements are ions of possible charge, for this reason they are called cations and need to lose electrons to maintain their stability in the valence layer.

The elements of the VIIA group are called halogens. This group is formed by the following chemical elements: fluorine, chlorine, bromine, iodine, astatine or Astatinium and Ununseptium. Together with Noble Gases (group 18 or 8A), the Halogen family are the only families that have only Nonmetals.

Halogens are negative ions, so they are classified as anions and receive electrons to maintain stability in their valence layers.