Elements
Hydrogen
The smallest particle of an element
atom
2 atoms of Oxygen
02
A pure substance is
made from the same element or same repeating atoms
O2
Oxygen gas
On the periodic table, C, stands for
Carbon
Formed when two or more atoms join together
molecule
one atom of carbon and four atoms of hydrogen
CH4
An impure substance is
a mix of atoms and elements that are different
O3
Ozone
On the periodic table, Na, stands for
Sodium
The three states of matter
solid, liquid, gas
one atom of sodium, one atom of oxygen, and one atom of hydrogen
NaOH
four molecules of H20
pure
CH4
Methane
On the periodic table, Cl, stands for
Chlorine
A molecule of sugar has 45 atoms. If a sugar crystal has 1000 molecules, how many atoms are present?
45,000
KMg2
N2O
Nitrous Oxide
On the periodic table, Au, stands for
Gold
The hierarchy of solids from least to greatest
atom, molecule, subunit, repeating subunits, crystal
one atom of titanium, one atom of iron, and four atoms of helium
TiFeHe4
Make a model representing an impure substance
H2CO3
Carbonic acid