atoms Flashcards
(18 cards)
what do chemical reactions cause atoms to do
change what they are bonded to
what is an element
a substance that contains only one type
of atom
what is an example of an element
Mg , O2
what is a compound
a substance containing two or more types of atoms ( chemically bonded )
what is an example of a compound
H2O
what can’t atoms be
created or destroyed
what must equations always be
balanced
what does a mixture consist of
different substance that are NOT chemically bonded
what is an example of a mixture
air, solutions
what is filtration
removing large , insoluble particles from a liquid
what is an example of filtration
sand from water
what does evaporation do
leaves behind crystals of a dissolved substance
what does chromatography do
causes substance to rise up paper
what is distillation
condenses the evaporated solvent and collects it
what is the relative charge for a
proton
neutron
electron
+1
0
-1
what is the relative mass for
proton
neutron
electron
1
1
0
what is the mass number
protons and neutrons in a nucleus
what is the atomic number
protons in a nucleus
