Which of the following is NOT a group on the periodic table? A. Metalloids B. Alkali metals C. Halogens D. Alkali Earth metals

A. Metalloids

Explanation:

A group is a vertical column going down on the periodic table.

Group 1A is known as the alkali metals.

Group 2A is known as the alkali earth metals.

Group 7A or 17 elements are called halogens.

Metalloids do exist on the periodic table but they are diagonal starting with boron and ending with astatine. Therefore, metalloids are not a group on the periodic table.

Hope that helps.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.