Download 1 - My eCoach

Name _______________________
Date _____________ Period ____
FILL IN THE CHART WITH THE MISSING VALUES
ATOM /
ION
ATOMIC
#
ATOMIC
MASS
Copper
29
65
4.
?
Phosphide
ion
5.
?
15
6.
8.
?
?
# OF
PROTONS
1.
?
# OF
ELECTRONS
2.
74
9.
?
?
# OF
NEUTRONS
3.
CHARGE
?
74
18
112
16
7.
10.
For the following nuclear equations find the missing information
11.
Np + 6Li 
a. 244Pu
b. 244Am
238
1
H
c.
d.
12. 14C  14N + _?_
a. proton
b. neutron
13. 238U 
a. 232
b. 234
4
He +
+ ______
234
243
Pu
Am
c. alpha
d. beta
?
Th
c. 236
d. 242
14. Why are many of the masses listed on the period table decimal numbers?
a. The masses of the electrons are less than one
b. The numbers are actually weighted averages of the isotopes
c. Some of the atomic mass has been destroyed
d. Scientists are unsure of the actual mass
15. The gold foil experiment provided evidence of all of the following except:
a. The nucleus of an atom is very small
b. Atoms are mostly empty space
c. Electrons have a very small mass
d. The nucleus of an atom is very dense
16. To find the atomic mass of an atom:
a. Count the protons
b. Add the number of protons and number of neutrons
c. Add the atomic number and number of protons
d. Add the electrons and protons
17. Atoms are electrically neutral because:
a. The charge of the electrons is balanced by the charge of the protons
b. Neutrons prevent the existence of any charge
c. The charge on all of the subatomic particles is already zero
d. The charge of the protons is balanced by the charge of the neutrons
18. A sample of Strontium 90 undergoes radioactive decay by emitting an alpha
particle. The remaining atom is:
a. Yttrium 90
c. Rubidium 88
b. Krypton 86
d. Rubidium 86
0
?
?
19. The smallest piece of matter that retains all of the properties of the matter is
a/an:
a. Proton
c. Neutron
b. Atom
d. Electron
MATCHING: match the word to the definition, some words are not used.
20. A large atom splits into smaller atoms and
releases some energy
21. Energy released by atoms
22. Having the same number of protons but a
different number of neutrons
23. Contains nearly all of the mass of an atom
24. Having an unstable nucleus







ISOTOPE
FISSION
FUSION
RADIATION
NUCLEUS
RADIOACTIVE
ELECTRON
CONSIDER THE IMAGE BELOW FOR THE FOLLOWING QUESTIONS
X
Y
Z
25. Which of the following types of radiation is a beta particle?
a. Type X
b. Type Y
c. Type Z
26. Which particle(s) are affected by magnets?
a. X only
b. X and Y
c. Y and Z
d. X, Y, and Z
27. If an atom emits an alpha particle, its atomic number will:
a. Increase
c. Stay the same
b. Decrease
d. Become negative
28. Different elements never have the same number of:
a. Electrons
c. Neutrons
b. Protons
d. Isotopes
29. In the isotopes of pennium lab, the pennies represented
a. Individual Atoms
c. Radioactive decay
b. Individual elements
d. Copper
30. The primary force that prevents the nucleus of an atom from flying apart is:
a. Gravity
c. The strong nuclear force
b. The electrostatic force
d. The weak nuclear force
32. Radioactive elements change into different elements as time goes by.
a. True
b. False
33. Natural gallium is found to be 60.1% 69Ga and 39.9% 71Ga. What is the
average weighted atomic mass for Gallium?
a. 63.3 amu
b. 69.8 amu
c. 70.2 amu
d. 73.0 amu
34. How many electrons does an atom of strontium have in its last energy level?
a. One
b. Two
c. Three
d. Four
35. how many electrons does an atom of argon have in its last energy level?
a. Two
b. Four
c. Six
d. Eight
36. How many energy levels does an atom of silver have?
a. Two
b. Three
c. Four
d. Five
37. The experiment that discovered the electron
a. Cathode ray tube
b. Oil drop experiment
c. Gold foil experiment
38. The experiment that discovered that the nucleus of atoms is charged
a. Cathode ray tube
b. Oil drop experiment
c. Gold foil experiment