Weegy: CO2 is a compound.
User:
A(n) _____ is the smallest complete part of a compound.
A. ion
B. atom
C. element
D. molecule
Weegy: A molecule is the smallest complete part of a compound.
User:
Which substance is NOT a compound?
A. salt
B. sodium
C. pure water
D. carbon monoxide
Weegy: SODIUM is NOT a compound.
(More)