CST Review_Atoms and Atomic Structure

CST Review
Atoms and
Atomic
Structure

Atomic Structure Graphic Organizer
+
+
Proton
Electron
Nucleus
-
-
Energy
Levels
Neutron
-
-
Helium Atom
Electron
Cloud
+ 1 (positive) 0 (no charge neutral)
- 1 (negative)
1 AMU 1 AMU
0 AMU Electrons swirl around
the nucleus at high
speeds forming a cloud.
Far from the nucleus
Number of protons
nucleus nucleus
Number
Atomic
Average
Mass
Atomic
protons + neutrons
Study

Isotope Graphic Organizer
Study

BrainPop
Atomic Model
Brain Pop

10. What is the reference point?
CST Review Questions
21

How are electrons, protons and neutrons arranged in the atom?
A. Protons and neutrons are in the center of the atom.
Bohr Atom
protons
neutrons

Bohr Atom
protons
neutrons
nucleus
1. The center of the atom is called the nucleus.

B. Electrons swirl around the nucleus at high speeds,
forming a cloud.
Bohr Atom
electrons
Electron Cloud

protons
neutrons
nucleus
Copy This Diagram in Your Notes.
electrons

How are isotopes written?
Carbon-13
X. Isotope names contain the name of the
element and the mass number of the
isotope.
Isotope name
element mass number

How many neutrons do atoms have?
protons
neutrons
Carbon-14
6 protons
8 neutrons
14 total
Carbon-13
6 protons
7 neutrons
13 total
Carbon-12
6 protons
6 neutrons
12 total
IX. Forms of an element with different
numbers of neutrons are called isotopes.
3 isotopes of carbon

Carbon-14
6 protons
8 neutrons
14 total
Carbon-13
6 protons
7 neutrons
13 total
Carbon-12
6 protons
6 neutrons
12 total
A. Isotopes are named by the element’s
name and mass number (the number of
protons + neutrons.)
isotopes of carbon

Think-Group-Share
1. THINK: Read the question and THINK
about the answer.
2. GROUP: Discuss the answer with your
teammates and agree on the correct
answer.
3. SHARE your answers by writing them on
the magnetic slate and holding them up.

Think-Group-Share
What is the smallest particle of an
element?
 a molecule
 an atom
a compound

What are the smallest particles of an element?
I. Atoms are the smallest particles of an
element (building blocks of matter).
Nickel Atoms
Nickel
Coin
Nickel Metal Foil

Think-Group-Share
Name the three subatomic particles
in the atom.
 electrons
 quarks
 neutrons
 protons
 isotopes

What subatomic particles are in the atom?
II. Scientists discovered that atoms contain
three subatomic particles :
- protons
- neutrons
- electrons.
An Oxygen Atom
proton
neutron
electron
The Element Oxygen

Think-Group-Share
Where are protons located in the
atom?
 electron cloud
 energy levels
 nucleus

Think-Group-Share
Where are neutrons located in the
atom?
 electron cloud
 energy levels
 nucleus

A. Protons and neutrons are in the
center of the atom.
Bohr Atom
protons
neutrons

Bohr Atom
protons
neutrons
nucleus
1. The center of the atom is called
the nucleus.

Think-Group-Share
Where are electrons located in the
atom?
 nucleus
 energy levels

B. Electrons are in different energy levels
depending on their energy.
Bohr Atom
Electron Cloud
electrons
electron orbitals
electron shells
electrons
Electrons move in
different energy
levels

Think-Group-Share
How do electrons move in the
atom?
A. They do not move.
B. They move slowly in the nucleus
of the atom.
C. They swirl around the nucleus at
high speeds.

Electrons swirl around the nucleus at high
speeds
Bohr Atom
electrons
High Speeds

Think-Group-Share
What do electrons form in the atom?
 energy levels
 electron cloud
 nucleus

Electrons move so fast they form a blur called
an electron cloud.
Bohr Atom
electrons
Electron Cloud

Think-Group-Share
What is most of the atom?
A. the nucleus
B. solid
C. empty space

E. Most of the atom is empty space.
nucleus
electron

Think-Group-Share
Where is the majority of the MASS
of an atom?
A. In the electron cloud.
B. In the nucleus.
C. In the energy levels.

Think-Group-Share
What charge does a proton have?
A. positive (+1)
B. negative (-1)
C. neutral - no charge (0)

Think-Group-Share
What charge does a proton have?
A. positive (+1)
B. negative
C. neutral (no charge)

Think-Group-Share
What charge does a neutron have?
A. positive (+1)
B. negative (-1)

Think-Group-Share
What charge does a neutron have?
A. positive
B. negative

Think-Group-Share
What charge does an electron
have?
A. positive (+1)
B. negative (-1)

What are the charges of the subatomic particles?
IV. Scientists discovered that:
- protons have a positive (+1) charge
- electrons have a negative (-1) charge
- neutrons have no (0) charge
Atom
proton: + charge
neutron: no charge
electron: - charge

Think-Group-Share
How do the sizes of protons and
neutrons compare?
A. They are the same size.
B. Protons are smaller than
neutrons.
C. Neutrons are smaller than
protons.

What are the masses of electrons, protons and neutrons?
V. Protons and neutrons are the same size
and mass.
protons
neutrons

Think-Group-Share
How do the sizes of protons and
electrons compare?
A. They are the same size.
B. Electrons are MUCH smaller than
protons.
C. Protons are MUCH smaller than
electrons.

C. Electrons are MUCH smaller than protons
and neutrons.
protons
neutrons
electrons

1. Electrons are almost 2000 times lighter than
protons and neutrons.
protons
neutrons
electrons
2000 2000

Think-Group-Share
What is the mass of a proton?
A. 1 AMU (atomic mass unit)
B. 0 AMU (atomic mass unit)

A. The mass of a proton is 1 AMU (atomic mass
unit).
proton:
1 AMU
1 AMU

Think-Group-Share
What is the mass of an electron?

2. Electrons are so small that their mass is
almost nothing (0 AMU).
protons
neutrons
electrons
0 AMU

Think-Group-Share
What is the mass of a neutron?

B. The mass of a neutron is 1 AMU (atomic
mass unit).
neutron:
1 AMU
1 AMU

Think-Group-Share
What is atomic number?
A. The number of protons + neutrons.
B. The number of protons.
C. The number of neutrons.

How many protons do atoms have?
B. The number of protons of an
element is called the atomic number.
Carbon
Oxygen
6 protons
Atomic Number = 6
8 protons
Atomic Number = 8
Hydrogen
1 proton
Atomic Number = 1

Think-Group-Share
What is the arrow in the diagram
pointing to?
C
6
Carbon
12.01
 Average Atomic
Mass
Atomic Number
 Mass Number

Think-Group-Share
pointing to?
 Atomic Mass
Atomic Number
 Mass Number of
the most common
isotope.
C
6
Carbon
12.01

Think-Group-Share
What is the name of the element
with an atomic number of 92?

 Uranium
Think-Group-Share
What is the name of the element
with an atomic number of 92?

 Uranium
Think-Group-Share
What is the atomic number of
Barium?

 56
Think-Group-Share
What is the atomic number of
Barium?

 56
Think-Group-Share
How many protons does the
element Arsenic have?

 33
Think-Group-Share
How many protons does the
element Arsenic have?

 Cu
Think-Group-Share
How many electrons does a neutral
atom of Silver have ?

 47
Think-Group-Share
How many electrons does a neutral
atom of Silver have ?

Think-Group-Share
What is mass number?
B. The number of protons.
C. The number of neutrons.

A. The sum of neutrons + protons in an
element is called the mass number.
protons
neutrons
Carbon-14
6 protons
8 neutrons
14 total
(Mass Number)
Carbon-13
6 protons
7 neutrons
13 total
(Mass Number)
Carbon-12
6 protons
6 neutrons
12 total
(Mass Number)

Carbon-13
III. Isotope names contain the name of the
element and the mass number of the
isotope.
Isotope name
element mass number
Draw this

Think-Group-Share
What is the mass number of the
isotope Cesium-141?

Think-Group-Share
What is the mass number of the
isotope Cesium-141?
 141

Think-Group-Share
What is average atomic mass?
B. The number of neutrons.
C. The average mass of all of the
isotopes.

How are mass numbers shown on the periodic table?
A. The average atomic mass is the average
mass of all of the isotopes of that element.
C
6
Carbon
12.01 Average Atomic Mass
(larger number on the chart)
Atomic Number
(smaller number on the chart)
protons

Think-Group-Share
pointing to?
C
6
Carbon
12.01
 Average Atomic
Mass
Atomic Number
 Mass Number of
the most common
isotope.

How are mass numbers shown on the periodic table?
IV. The average atomic mass of an element
is shown on the periodic square (larger
number).
C
6
Carbon
12.01 Average Atomic Mass
Atomic Number
protons

Think-Group-Share
What is the same about all isotopes
of an element?
A. They have the same number of
neutrons.
B. They have the same number of
protons.
C. They have the same atomic mass.

I. An element can have different
numbers of neutrons.
protons
neutrons
Carbon-14
6 protons
8 neutrons
14 total
Carbon-13
6 protons
7 neutrons
13 total
Carbon-12
6 protons
6 neutrons
12 total

Think-Group-Share
What is different about the isotopes
of an element?
A. They have different numbers of
neutrons.
B. They have different numbers of
electrons.
C. They have different numbers of
protons.

What is an isotope of an element?
protons
neutrons
Carbon-14
6 protons
8 neutrons
14 total
Carbon-13
6 protons
7 neutrons
13 total
Carbon-12
6 protons
6 neutrons
12 total
II. The same element with different
numbers of neutrons is called an isotope.
3 isotopes of carbon

Think-Group-Share
What is the isotope name of the atom
with 3 protons and 4 neutrons?

Think-Group-Share
 Lithium-7

Think-Group-Share
 Lithium-7
Mass Number = 3 protons + 4 neutrons

Carbon-13
Review
Isotope name
element mass number

C-13
Review
Isotope Symbol
chemical
symbol
mass number

Where are the most common mass numbers shown?
Review
C
6
Carbon
12.01 Avg Atomic Mass
Atomic Number
protons

Where are the most common mass numbers shown?
Review
C
6
Carbon
12.01 Atomic Mass
Atomic Number
protons

CST Review_Atoms and Atomic Structure

More Related Content

CST Review_Atoms and Atomic Structure