Which of the following is a homonuclear polyatomic element?

How many atoms are specified by each of these prefixes: mono-, di-, tri-, tetra-, penta-, hexa-?

Element A is an atomic element, and element B is a diatomic molecular element. Using circles to represent atoms of A and squares to represent atoms of B, draw molecular-level views of each element.

Based on the molecular views, classify each substance as an atomic element, a molecular element, an ionic compound, or a molecular compound.

Why don't you find "hunks" of alkali metals lying around in nature?

Which among the following elements does not exist as a diatomic molecule in nature?

Identify the elements that have molecules as their basic units. a. nitrogen b. argon c. hydrogen d. helium