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Atomic Structure
Test Description: This set covers atomic structure and includes counting electrons protons, isotopes, and ions.
Instructions: Answer all questions to get your test result.
1) How many electrons does a neutral atom of potassium have?
A
39.098
B
20
C
39
D
19
2) How many electrons does a neutral atom of bromine have?
A
79.904
B
80
C
45
D
35
3) How many protons and electrons does an ion of Ca+2?
A
18 protons and 20 electrons
B
20 protons and 22 electrons
C
20 protons and 18 electrons
D
22 protons and 20 electrons
4) How many protons and electrons does an ion of S-34?
A
16 protons and 14 electrons
B
14 protons and 16 electrons
C
16 protons and 18 electrons
D
18 protons and 16 electrons
5) How many protons and electrons does an ion of Na+1?
A
11 protons and 10 electrons
B
10 protons and 11 electrons
C
11 protons and 12 electrons
D
12 protons and 11 electrons
6) How many electrons does a neutral atom of uranium have?
A
92
B
238.029
C
238
D
146
7) Which symbols represent atoms that are isotopes?
A
C-14 and N-14
B
I-131 and I-131
C
Rn-222 and Ra-222
D
O-16 and O-18
8) Which atom contains exactly 15 protons?
A
oxygen-15
B
sulfur-32
C
nitrogen-15
D
phosphorus-32
9) Almost the entire mass of an atom is concentrated in the _____.
A
protons
B
neutrons
C
nucleus
D
electrons
10) The nucleus of an atom has all of the following characteristics EXCEPT that it
A
is positively charged
B
is very dense
C
contains nearly all of the atoms volume
D
contains nearly all of the atoms mass
*select an answer for all questions
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