Prefixes
milli-
10-3
1 in = ___ cm
2.54 cm
2.5 + 10.5 =
13.0
The Law of Conservation of Mass was developed by ___ ____.
Antoine Lavoisier
atomic number
Defines the identity of an atom; describes the number of protons in the nucleus; equals the number of electrons in a neutral atom since charges balance
kilo-
103
1 m = ___ ft
3.280 ft
1.00 + 2.4 =
3.4
Who proposed the Plum Pudding model? Which experiment, and by who, showed that model was incorrect?
JJ Thomson proposed the Plum Pudding Model.
Ernest Rutherford showed it was incorrect with his Gold Foil Experiment.
mass number
describes the sum of protons and neutrons in an atom
deci-
10-1
1 km = ___ mi
0.621 mi
353.3/722 =
0.489
The modern periodic table is based off a periodic table created by ___ ___.
Dmitri Mendeleev
isotope
have the same atomic number but different mass number
micro-
10-6
1 kg = ____ lb
2.204 lb
234.40 x 63 =
1.5 x 104
Dalton's atomic theory had 4 parts. What are they?
1. Matter is composed of indivisible atoms
2. Atoms of each element are unique
3. Atoms don't change in chemical reactions
4. Atoms combine in whole-number ratios
ion
atom (or groups of atoms) with a net positive or net negative charge
mega-
nano-
mega-: 106
nano-: 10-9
1 L = ___ gal
0.264 gal
23 x 33.4 + (202/10.0) =
7.9 x 102
Which part of Dalton's atomic theory was not true?
Mater is composed of indivisible atoms.
Atoms can be separated into protons, neutrons, and electrons
periods vs. groups
periods: horizontal rows on the periodic table
groups: vertical columns on the periodic table