Answer:

mols

Answer	Crossword Clue
MOLS	Small amts.
MOLS	Tiny particles: Abbr.
MOLS	Particles: Abbr.

MOLS	Atomic groups: Abbr.
MOLS	Chem. units
MOLS	Compound fractions: Abbr.
MOLS	Compound parts: Abbr.

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.