Warm Up
(Write down the question and your answer)
What is the difference
between atomic number and
mass number?
Card Sort Directions
Place the cards under
the name of the
correct scientist. Don’t
use your notes!
Dalton
Thomson
1) All matter made of tiny
particles called atoms
2) All atoms of the same
element are identical
3) Atoms are indivisible (can’t be
broken into smaller parts)
4) Different atoms combine to
make compounds
5) Atoms are rearranged during
chemical changes
Discovered
Electrons
Plum Pudding
Model
Rutherford
Bohr
Had the idea that electrons
are in orbits around the
nucleus
Discovered that
atoms have a
nucleus
1
Is the mass of the water
intensive or extensive?
Extensive
2
Is the color of the water
intensive or extensive?
Intensive
3
Is the odor of the water
intensive or extensive?
Intensive
4
Is the volume of the water
intensive or extensive?
Extensive
5
Is the conductivity of the water
intensive or extensive?
(conductivity is ability to conduct electricity)
Intensive
6
What is the difference in these
isotopes of hydrogen?
Isotope
Hydrogen–1
(protium)
Hydrogen-2
(deuterium)
Hydrogen-3
(tritium)
Nucleus
They have
different
numbers of
nuetrons.
7
Isotopes are
atoms of the
same element
that have
different masses
because they
have different
numbers of
_____________.
Neutrons
8
Mass Number is
_________ + _________
Protons
+
Neutrons
9
Which two
subatomic
particles are
found in the
nucleus?
Protons
and
Neutrons
10
Atomic Number is the number
of ______ in an atom.
Protons
11
How many protons does
neon (Ne) have?
10
12
Write the
nuclear
notation of
Neon – 22.
22
10 Ne
13
How many
neutrons would
Neon-22 have?
12
14
Tell how many protons,
neutrons and electrons
this atom would have:
Neutrons = 7
F
Electrons = 9
16
9
Protons = 9
15
2 of Dalton’s theories were wrong. which
two are they?
Dalton’s Theory (Postulates)
1) All matter made of tiny particles called atoms
2) All atoms of the same element are identical
3) Atoms are indivisible (can’t be broken down into
smaller parts)
4) Different atoms combine to make compounds
5) Atoms are rearranged during chemical changes
16
Whose model of the
atom is this?
Rutherford
17
Whose model of the
atom is this?
Thomson
18
19
Whose model of the
atom is this?
What experiment
does this picture go
with?
Gold
Bohr
Foil
Experiment
20
Draw a Bohr Model of Helium-3
(use the correct numbers of protons, neutrons and
electrons, and put them all in the right place!)
Isotope
Atomic Mass Percentage of
Abundance
Boron - 10
10.01
19.9%
Boron - 11
11.01
80.1%
Silicon - 28
Silicon - 29
Silicon - 30
27.97
28.97
29.97
92.2%
4.6%
3%
Put the following into nuclear notation,
and tell how many protons, neutrons,
electrons each has.
1. Atomic Number 39, mass number 89
2. Xenon – 135 (symbol is Xe)
3. An atom that has 18 protons and 22
neutrons
4. Platinum-198 (symbol is Pt)