Atom Vs Ion Vs Molecule Vs Formula Unit Flashcards
0
Q
Molecules and formula units must both be…
A
Compounds
1
Q
Atom:
A
Smallest particle of a unit. No charge
2
Q
For something to be a molecule…
A
It must be a compound that does not qualify as a formula unit.
Exceptions: water and ammonia (NH3) are both molecules, never formula units.
3
Q
Atomic mass vs. formula units
A
Atomic mass is just for atoms and formula mass is for compounds
4
Q
A substance that cannot be broken down into simpler substances by a chemical change is an
A
Element
5
Q
Horizontal rows in the periodic table are called
A
Periods
6
Q
Vertical columns in the periodic table are called
A
Groups, or families
7
Q
A substance that contains two or more elements chemically combined in a fixed proportion is
A
A compound
