What is the arrow pointing to?
a. ions and molecules form a water solution.
b. the water molecule is charged neutrally.
c. the molecule that consists of two atoms is negatively charged.
d. a single positively charged atom is highlighted with an arrow.
e. water molecule hydroxide ion electron hydronium ion hydrogen ion

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

it's c (engineer's do their work with mechanical stuff not on any living being)