Mrscarusochemistry.weebly.com
Name: __________________
Date: ___________________
Unit 3 Review Packet
Subatomic Particles and the Nuclear Atom
1. Know the scientists and their contributions to atomic theory.
|Scientist’s Name |Contribution |Experiment |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
2. What particles make up the mass of an atom? __________________________
3. What are the results and conclusions of the gold foil experiment?
a. Result 1: _________________________________________________
Conclusion 1: _____________________________________________
b. Result 2:__________________________________________________
Conclusion 2: _____________________________________________
4. Draw and label a diagram of each atomic model below:
a) Plum Pudding Model
b) Nuclear Atomic Model
5. Complete the following table of proton, electron, and neutron characteristics:
|Particle |Symbol |Location |Charges |Mass |
|Proton | | | | |
| |n0 | | | |
| | | | |0amu |
How Atoms Differ
For each statement below, write true or false:
_________ 1. The number of neutrons in an atom is referred to as its atomic number
_________ 2. The periodic table is arranged by increasing atomic number
_________ 3. The number of protons in an atom identifies it as an atom of a particular element
_________ 4. In a neutral atom, the atomic number is equal to the number of electrons
_________ 5. The number of neutrons comes from subtracting the mass number from the atomic number
Answer the following questions:
6. Lead has an atomic number of 82. How many protons and electrons does lead have? _______________
7. Oxygen has 8 electrons. How many protons does oxygen have? __________
8. Zinc has 30 protons. What is its atomic number? ____________
9. Complete the following chart:
|Symbol |Protons |Neutrons |Electrons |Mass Number |Atomic Number |
|Ca | | | | | |
|Sr | | | | | |
|As | | | | | |
Determine the number of protons, electrons, and neutrons for each isotope described below:
10. As isotope has an atomic number of 19 and a mass number of 39:
a. Protons: _________
b. Electrons: ________
c. Neutrons: ________
11. An isotope has 14 electrons and a mass number of 28:
a. Protons: _________
b. Electrons: ________
c. Neutrons: ________
Write each isotope below in symbolic notation. Use the periodic table to determine the atomic number of each isotope:
12. Neon-22 _______________
13. Cesium-133 _____________
Circle the letter of the choice that best completes the statement:
14. The mass of an electron is:
a) Smaller than the mass of a proton
b) Smaller than the mass of a neutron
c) A tiny fraction of the mass of an atom
d) All of the above
15. The atomic mass of an atom is usually not a whole number because it accounts for:
a) Only the relative abundance of the atom’s isotopes
b) Only the mass of each of the atom’s isotopes
c) The mass of the atom’s electrons
d) Both the relative abundance and the mass of each of the atom’s isotopes
Isotopes:
1. Calculate the average atomic mass of the element described below. Then, use the periodic table to identify the unknown (X) element.
|Isotope |Mass (amu) |Percent Abundance |
|63X |62.930 |69.17 |
|65X |64.928 |30.83 |
2. Element Y exists in three isotopic forms. The isotopic mixture consists of 15.0% 21X, 65.0% 22X, and 20.0% 23X. What is the average mass of this element?
3. Element X exists in three isotopic forms. The isotopic mixture consists of 10.0% 10X, 20% 11X, and 70% 12X. What is the average atomic mass of this element?
Alpha and Beta Decay:
1. What is the symbol for alpha decay? ________
2. What is the symbol for beta decay? ________
3. 23090Th ( 22688Ra + _________
4. 21484Po ( 21082Pb + _________
5. 22286Rn ( ________ + 42He
Unstable Nuclei and Radioactive Decay
Complete the following table of the characteristics of alpha, beta, and gamma radiation:
|Radiation Type |How does the nucleus change? |Symbol |Charge |
|Alpha | | | |
| | | | |
| | | | |
1. What is is the difference between fission and fusion?
Unit 2 Review:
Convert the following numbers into scientific notation:
1. 132,000,000 ___________________
2. 565.45 ___________________
3. 0.000481 ___________________
4. 0.0167 ___________________
5. 1.00865 ___________________
Convert the following into standard notation:
1. 1.56 x 104 ___________________
2. 7.86 x 10-6 ___________________
3. 3.4211 x 100 ___________________
4. 8.003 x 10-3 ___________________
5. 2.15 x 103 ___________________
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- getroman com reviews
- acurafinancialservices.com account management
- acurafinancialservices.com account ma
- getroman.com tv
- http cashier.95516.com bing
- http cashier.95516.com bingprivacy notice.pdf
- connected mcgraw hill com lausd
- education.com games play
- rushmorelm.com one time payment
- autotrader.com used cars
- b com 2nd year syllabus
- gmail.com sign in