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Grade 9 Chemistry
Test Description: Game
Instructions: Answer all questions to get your test result.
1) The atomic number of the element calcium Ca (Z=20, A=40) is:
A
20
B
40
C
60
2) The mass number of the element neon Ne (Z=10, A=20) is:
A
10
B
30
C
20
3) The number of neutrons of the element magnesium Mg (Z=12, A=25) is:
A
12
B
15
C
13
4) The atomic number of an oxygen atom that has 17 nucleons and 9 neutrons is:
A
8
B
26
C
9
5) The atomic number of a sodium atom that has 11 protons, 11 electrons and 12 neutrons is:
A
12
B
23
C
11
6) The mass number of a fluorine atom that has 9 protons, 9 electrons and 11 neutrons is:
A
9
B
11
C
20
7) The mass number of a carbon atom that has 6 protons and 12 nucleons is:
A
12
B
18
C
6
8) Isotopes have:
A
The same number of neutrons
B
The same number of protons
C
The same number of nucleons
9) Mg (Z=12, A=23) and X (Z=12, A=25):
A
Allotropes
B
Isotopes
C
Atoms of different elements.
10) X (Z=13, A=27) and X (Z=14, A=27):
A
Isotopes
B
Atoms of different elements.
C
Allotropes
*select an answer for all questions
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