The chemical formula of chalk is caco3. identify the elements and calculate the number of atoms of each element in the smallest unit of chalk

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Consider the story you just read. all but one of the choices below indicate that something is living.

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements