I. An atom is the smallest unit of an element and a molecule is made up of two or more atoms chemically bonded together.

II. An atom is indivisible and a molecule can be broken down into atoms.

III. An atom is the smallest unit bonded together and a molecule is made up of elements.

IV. An element is the smallest unit of an atom and a molecule is made up of two or more metal and non-metal atoms chemically bonded together.

Which conclusion(s) best elaborate on the difference(s) between an atom and a molecule?

A) I & II

B) II & III

C) III & IV

D) IV & I

Option A)I & II

Explanation:

An atom is the smallest part of an element that can ever exist and still possess the chemical properties of the element. Also, an atom cannot be divided (i.e indivisible) into different atoms unlike a molecule that can be divided into different atoms. An example of atom is chlorine atom

On the other hand, since atoms cannot exist alone, they chemically bond with other atoms of same or different elements to form molecules. A good example of molecule is hydrogen chloride molecule (HCl) that contains two atoms, while a starch molecule contains thousands of atoms.

b. a lightning bug, plug of grass, and a worm