Chemistry Unit 1Test
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Chemistry Unit 1 Test
This test is the Unit 1 Common Assessment
Topics covered:
Models of the atom (Bohr, Rutherford)
Electronic structure of the atom, atomic emission spectra (flame test spectroscopy / gas discharge tube spectra)
The nucleus: neutrons, protons
Isotopes
Nuclear Chemistry: Why nuclei decay, decay modes – alpha, beta, gamma, half lives
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Question 1 of 23
1. Question
Two protons are ______________________ one another.
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opposite charges attract
like charges repel -
Question 2 of 23
2. Question
Two electrons are _____________________ one another.
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opposite charges attract
like charges repel -
Question 3 of 23
3. Question
The nucleus has a _________________ charge.
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the nucleus contains protons and neutrons
protons are + charge, neutrons are neutral is no charge
therefore the nucleus has a positive charge due to the prtons -
Question 4 of 23
4. Question
If the nucleus were the size of a ping pong ball, then the atom would be the size of _______.
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Question 5 of 23
5. Question
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Question 6 of 23
6. Question
Use your periodic table to answer this question;
Mo (Molybdenum)
most common isotope 98 amu (24%)
most of the other isotopes are lighter from 92-97amu (65% total)
heavier isotopes 99, 100 amu comprise only 10% of natural abundancesWhat is the atomic number of molybdenum?
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Question 7 of 23
7. Question
Use your periodic table to answer this question;
Mo (Molybdenum)
most common isotope 98 amu (24%)
most of the other isotopes are lighter from 92-97amu (65% total)
heavier isotopes 99, 100 amu comprise only 10% of natural abundancesWhat is the atomic weight of molybdenum?
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Question 8 of 23
8. Question
Use your periodic table to answer this question;
Mo (Molybdenum)
most common isotope 98 amu (24%)
most of the other isotopes are lighter from 92-97amu (65% total)
heavier isotopes 99, 100 amu comprise only 10% of natural abundancesHow many protons are in the nucleus of molybdenum?
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Question 9 of 23
9. Question
Use your periodic table to answer this question;
Mo (Molybdenum)
most common isotope 98 amu (24%)
most of the other isotopes are lighter from 92-97amu (65% total)
heavier isotopes 99, 100 amu comprise only 10% of natural abundancesHow many neutrons are found in the most common isotope of molybdenum?
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Incorrect
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Question 10 of 23
10. Question
Use your periodic table to answer this question;
Mo (Molybdenum)
most common isotope 98 amu (24%)
most of the other isotopes are lighter from 92-97amu (65% total)
heavier isotopes 99, 100 amu comprise only 10% of natural abundancesHow many electrons are in an electrically neutral atom of molybdenum?
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Incorrect
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Question 11 of 23
11. Question
What is the electronic configuration for Al?
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Hint
Hint: Draw the orbital filling triangle.
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Question 12 of 23
12. Question
When electrons absorb the right amount of energy, they jump from ___________________.
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Question 13 of 23
13. Question
You order potassium chloride and sodium chloride from a chemical supplier, but when the two compounds arrive, their labels have been torn off. What is the best way to determine which compound is which?
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Question 14 of 23
14. Question
What is the correct order of Schrödinger’s first few atomic orbitals?
Another way to state this is; What is the correct order for filling orbitals with electrons?
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Hint
Hint: draw the orbital filling triangle.
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Question 15 of 23
15. Question
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Question 16 of 23
16. Question
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Question 17 of 23
17. Question
The diagram below shows how far radiation travels through certain materials. Each line represents a different form of radiation. Sort the answers to correspond to the lines on the diagram from top to bottom.
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alpha particles
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beta particles
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gamma rays
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Question 18 of 23
18. Question
What is the composition of each form of radiation?
Choose one.Correct
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Question 19 of 23
19. Question
Seaborgium-266 has a half-life of 10 seconds. If I have 500 grams of seaborgium-266, how much remains after 30 seconds?
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Question 20 of 23
20. Question
Balance the following nuclear reaction. Choose the number choice which has the correct letter answer.
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Question 21 of 23
21. Question
Balance the following nuclear equation. Choose the number choice which has the correct letter answer.
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Question 22 of 23
22. Question
Balance the following nuclear equation. Choose the number choice which has the correct letter answer.
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Question 23 of 23
23. Question
Balance the following nuclear equation. Choose the number choice which has the correct letter answer.
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