Physical Science Module #13 Test
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01. Define the following terms:
a. Nucleus
b. Atomic number
c. Mass number
d. Isotopes
e. Element
f. Radioactive isotope
02. Which is larger, an electron or a proton? Which is positively-charged?
03. what causes the b nuclear force, and why can this force act only over very short distances?
04. List the number of protons, neutrons, and electrons in the following atoms:
a.
48
Ca
b.
124
Sn
c.
109
Ag
05. Draw an illustration of what the Bohr model says a
23
Na atom looks like.
06. Which of the following atoms are isotopes?
144
Ce,
144
Nd,
144
Sm,
145
Nd
07. A radioactive isotope has a half-life of 3 hours. If a scientist has 30 grams of the isotope, how much is left after 15 hours?
08. What is the daughter product in the beta decay of
144
Ce?
09. What is the daughter product in the alpha decay of
220
Rn?
10. What is the daughter product in the gamma decay of
239
U?
11. If a piece of paper is placed between a radioactive isotope and a person, which kind of radioactive particle will the person be protected from?