Name __________________________
Date___________________________
The Atom- Review
1. Which statement is consistent with the results of Rutherford’s gold foil
experiment?
a.
b.
c.
d.
All atoms have a positive charge
Atoms are mostly empty space
The nucleus of an atom contains protons and electrons
Mass is spread uniformly throughout an atom
2. How many protons are found in an atom of each of the following?
a. Boron
b. Sulfur
c. Neon
d. Lithium
3. How did the results of Rutherford’s gold foil experiment differ from his
expectations?
4. How many protons are in the nuclei of the following atoms?
a. Fluorine
b. Argon
c. Manganese
5. How many neutrons are in the nuclei of the following atoms?
a. Scandium
b. Rubidium
c. Nickel
6. What is the difference between the mass number and the atomic number of
an atom?
7. Complete the table for the following elements:
Element
Manganese
Sodium
Bromine
Yttrium
Arsenic
Actinium
Symbol
Number
of
Protons
25
Number
of
Electrons
11
35
Number
of
neutrons
30
12
45
33
8. Name two ways that isotopes of an element differ.
Atomic
Number
Mass
Number
39
89
75
227
9. How many neutrons are in each atom?
a.
23
b.
238
c.
81
d.
19
11
92
35
9
Na
U
Br
F
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10. The two most abundant isotopes of carbon are carbon-12 (mass = 12.00 amu)
and carbon-13 (mass= 13.00 amu). Their relative abundances are 98.9 % and
1.10% respectively. Calculate the atomic mass of carbon.