Physical Science- Atomic Structure Test Review
Name _________________________________ Date __________Period ______
Fill-in. Complete the following sentences.
1. The atomic number is the number of _________________________________.
2. The mass number is the number of ____________________ and ___________________.
3. Subatomic particles with an atomic mass of 1 amu are the
____________________ and ___________________.
4. A neutral atom will have equal numbers of
____________________ and ___________________.
5. Isotopes have different numbers of _______________________________.
6. Most mass in the atom is located in the _____________________________.
7. Subatomic particles with a positive charge are called ___________________.
8. Subatomic particles with a negative charge are called ___________________.
9. Subatomic particles with a neutral charge are called ___________________.
10. The subatomic particles found in the nucleus are the _______________________
and the _________________________.
11. The subatomic particles found in energy levels are the _____________________.
12. The energy level closest to the nucleus can contain up to ______ electrons.
13. The second energy level in an atom can hold up to ________ electrons.
14. Circle all symbols that represent isotopes of the same element
Complete the following chart using a periodic table. Consider all the elements to be neutral.
Element
Atomic
Number
Mass
Number
20
12
40
15.
16.
Number
of
Protons
14
18.
8
15
31
Ne-20
23.
19
20
7
24.
25.
27.
29.
30.
2-5
Si-28
26.
28.
7
Cl-35
21.
22.
2-8-3
2-8-6
32
19.
Electron
Arrangement
6
17.
20.
Number
Number
of
of
Neutrons Electrons
5
19
40
11
10
22
12
13
5
12
2-8-1
31.
9
32. Fill in the following electron shells. Consider the atom to be neutral.
Carbon -13
Atomic number = _______________
Mass number = _________________
Electron arrangement= ___________
33. Fill in the following electron shells. Consider the atom to be neutral.
Oxygen-15
Atomic number = _______________
Mass number = _________________
Electron arrangement= ___________
34. Circle all symbols that represent
isotopes of the same element.
Atomic Structure Test Review – Page 3
Name
Period
Complete the following chart. Assume all elements to be neutral
Formula
Element
Atomic
number
Mass number
Number of
protons
Number of
neutrons
Number of
electrons
35.
36.
37.
38.
39.
40.
41.
42.
How isotopes are represented.
or U-238 or Uranium-238
These are three common ways isotopes are listed.
The mass number is 238.
The atomic number is 92.
The symbol for Uranium is U.