Download Assignment 5-2

Assignment 5-2
Name
Class Period
Date
1999 Sci-Ed Services
1. If two isotopes of carbon have the same atomic number (6), what is the difference between the two
isotopes?
2. Tritium, an isotope of hydrogen, has two neutrons and one proton.
a. What is the atomic number of this isotope?
b. What is the mass of an atom of this isotope in AMUs?
3. Explain why the nucleus accounts for 99.9% of the mass of an atom.
4. What is the atomic number of an atom?
5. Fill in the chart below.
PARTICLE
MASS (in amu’s)
CHARGE
LOCATION
proton
neutron
electron
6. What is the mass number of an atom?
7. What is the atomic mass of an element?
8. What is the maximum number of electrons for the first energy level in any atom?
9. What is the maximum number of electrons for the second energy level in any atom?
10. What is the maximum number of electrons for the third energy level in any atom?
11. What is the maximum number of electrons for the outside energy level in any atom?
12. How many protons would it take to equal 1 gram of mass?
Please continue on the other side.
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13. What is the name of the particles that make up protons and neutrons?
14. Approximately how many electrons does it take to equal the mass of a proton?
15. If an atom has a total of 10 electrons, how many energy levels does it have?
16. If an atom has a total of 12 electrons, how many energy levels does it have?
17. How many energy levels are in an atom of fluorine?
18. How many electrons in an atom of uranium-238?
19. How many protons in an atom of uranium-238?
20. How many neutrons in an atom of uranium-238?
21. Name the three isotopes of the element hydrogen and describe the contents of each of their nuclei.
22. How many of these particles (from #13) does it take to make up a neutron?
23. The atomic mass of hydrogen is about 1.00794 (AMUs). Why is it logical to assume that most
hydrogen atoms have no neutrons?
24. What determines an element’s bonding ability?
25. What names are used to describe the various properties of quarks?
26. How many of each kind of quark are thought to exist?
27. What type of particles are composed of three quarks?
28. Draw a diagram of a helium atom in the space below and label the parts.
493721290 Last printed 6/28/2017 6:24 AM