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Structure Of The Atom
Test Description: An Interactive quiz / Week …2..: Self-Learning Program: Scholastic Year 2020/2021
Instructions: Answer all questions to get your test result.
1) The atomic mass of the element calcium Ca (Z = 20, A = 20) is:
A
20 u
B
60 u
C
40 u
2) The charge of nucleus of the element neon Ne (Z = 10, A = 20)is
A
10+
B
20+
C
30+
3) The charge of the electron cloud of the element magnesium Mg (Z= 12, A = 24) is::
A
26 -
B
24 -
C
12 -
4) The atomic mass of an oxygen atom that has 17 nucleons and 9 neutrons is:
A
17 u
B
9 u
C
8 u
5) The atomic mass of a sodium atom that has 11 protons, 11 electrons and 12 neutrons is:
A
23 u
B
11 u
C
12 u
6) The charge of a fluorine atom that has 9 protons, 9 electrons and 11 neutrons is:
A
9
B
0
C
11
7) The average atomic mass of carbon – 12 and carbon – 14 is:
A
Between 12 u and 14 u
B
12 u
C
14 u
8) Isotopes have:
A
The same number of nucleons
B
The same number of neutrons
C
The same number of protons
9) (Z= 12, A = 23)Mg and (Z =12, A =25)X have the:
A
Same number of neutrons
B
Same nuclear charge
C
Same atomic mass
10) (Z =13, A=27)X and (Z =14, A =27)X have the:
A
Same number of neutrons
B
Same nuclear charge
C
Same atomic mass
*select an answer for all questions
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