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Name: ______________________________________________
1.2 Atomic Symbols
Announcements
DATE: 8/17/16
OBJECTIVES:
Student will be able to
HAVE OUTS:
 Construct complete atomic symbols for any given
Marvel Card
element based on the number of subatomic
Pencil
particles, atomic number, and or mass number.
Parents Sign Syllabus (if you forgot yesterday)
 Interpret complete atomic symbols for any given
element to determine the number of subatomic
HOMEWORK:
particles
Atomic Symbols Practice
Buy Supplies (Due Friday)
AGENDA:
Do First
Do First:
Notes
Scientist matching problems
Practice
IMPORTANT DATES:
8/19- Atomic Theories, Mass, and Symbols Quiz
8/19- Lab 1
Do First:
Directions: Put the number of the definition from the list projected into the square with the appropriate term. Check
your answers by adding the numbers to see if all the sums of all rows, both across and down add up to the same
number, the Magic #.
Democritus
Dalton
Thomson
Chadwick
Total
_____
_____
_____
______
_____
Rutherford
Proton
Atom
Bohr
_____
_____
_____
_____
_____
Wave Model
Neutron
Nucleus
Alpha particle
_____
_____
_____
_____
Electron
Model
Energy levels
Electron cloud
_____
______
_____
_____
Total _____
_____
_____
______
Magic Number ______
_____
_____
Name: ______________________________________________
1.2 Atomic Symbols
Other Information about Each of the Subatomic Particles
Subatomic Particle
Mass (in amu)
Role in the Atom
Protons
Neutrons
Electrons
amu (atomic mass unit) = a very small unit of mass used to measure the mass of subatomic particles/a single atom
Periodic Table:
What’s missing from the periodic table? ___________________________
A
Complete NAMES for a specific atom.
P
Name of the Element – Mass Number
E
M
A
N
Example:
Complete SYMBOLS for a specific atom.
Mass Number
Atomic Number
Element Symbol
Example:
Example #1
Protons =
Neutrons =
Electrons =
Atomic Number =
Mass Number =
Name =
Complete Symbol =
Key Fact
Protons =
Example #2
Neutrons =
206
82
Pb
Electrons =
Atomic Number =
Mass Number =
Name =
Complete Symbol =
Name: ______________________________________________
Example #3
1.2 Atomic Symbols
Protons =
Neutrons =
Electrons =
Atomic Number =
Mass Number =
Name =
Complete Symbol =
Fill in the table based on the symbols and subatomic particles Mr. Marshall provides. Once you have completed
all of the rows, answer the analysis questions.
Symbol
Protons
Neutrons
Analysis Questions:
1. How did you determine the atomic number?
2. How did you determine the mass number?
3. Were any of the atoms isotopes? How could you tell?
Electrons
Atomic
Number
Mass
Number
Name: ______________________________________________
1.2 Atomic Symbols
Homework:
Review of Atomic Structure
Complete the following sentences by writing in the correct word.
1. In a neutral atom, the number of electrons must be the same as the number of
.
2. The subatomic particle in an atom with no charge is the
.
3. The number of protons in an atom is the
number.
4. The total number of protons and neutrons in an atom is the
number.
Study the following model of an atom and answer the following questions about it.
5. How many electrons does this atom have?
6. How many protons does this atom have?
7. How many neutrons does this atom have?
8. What is the atomic number of this atom?
9. What is the mass number of this atom?
10. Find the name of this element by referring to the periodic table.
Complete the following chart.
Name
Symbol
Atomic Number
16
15
7
N
Mass Number
34
Protons
Neutrons
10
11
Electrons
Name: ______________________________________________
Practice Problems for Atomic Symbols
1. How many protons and electrons are present in a vanadium atom?
2. How many protons and electrons are present in a nitrogen atom?
3. How many protons and electrons are present in a potassium atom?
4. What is the name of the element that contains 5 protons?
5. What is the name of the element that has atoms that contain 5 protons?
6. What is the name of the element that has atoms that contain 17 protons?
7. What is the name of the element that has atoms that contain 82 protons?
8. What is the name of the element that has atoms that contain 92 protons?
1.2 Atomic Symbols
Name: ______________________________________________
1.2 Atomic Symbols
1) Represented by a symbol; all are found on the Periodic Table
2) Made a mental model of the atom; Greek philosopher
3) Used by Rutherford in his experiment; made of two protons and two
neutrons
4) The paths in which electrons circle the nucleus according to the Bohr
model
5) The positive particle in the nucleus of an atom
6) The tiny positive core of an atom; contains protons and neutrons
7) Formed the atomic theory model of the atom; English schoolteacher
8) Discovered the nucleus using his gold foil experiment
9) Current explanation of where electrons might be found in the atom
10) Used by scientists to explain something we cannot see or understand
11) The smallest particle of an element that has the properties of that
element
12) Discovered the neutron
13) Current model of the atom; proposed by Schrodinger
14) Mass of protons and neutrons
15) Developed the model of the atom in which electrons orbit the nucleus
in energy levels
16) The negative particle that circles the nucleus
17) The neutral particle in the nucleus of an atom
18) Proposed the “plum-pudding” model of the atom; discovered the
electron