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Structure Of The Atom
Test Description: An Interactive quiz / Week 3: Self-Learning Program: Scholastic Year 2020/2021
Instructions: Answer all questions to get your test result.
1) The atomic number of the element sodium (Z = 11, A = 23)Na is:
A
13
B
11
C
12
2) The charge of the nucleus of the element neon (Z = 10, A = 20)Ne is:
A
20+
B
30+
C
10+
3) The charge of the electron cloud of the element potassium (Z = 19, A = 39)K is:
A
19 -
B
20 -
C
39 -
4) The atomic mass of an oxygen atom that has 16 nucleons and 8 neutrons is:
A
24 u
B
8 u
C
16 u
5) The mass number of a magnesium atom that has 12 protons, 12 electrons and 13 neutrons is:
A
13
B
25
C
12
6) The number of neutrons of a fluorine atom that has 9 protons, 9 electrons and 19 nucleons is:
A
19
B
9
C
10
7) The average atomic mass of chlorine – 35 and chlorine – 37 is:
A
More than 37 u
B
Between 35 u and 37 u
C
Less than 35 u
8) Isotopes have the:
A
Same number of electrons
B
Same number of nucleons
C
Same number of neutrons
9) (Z = 12, A = 25)Mg and (Z = 13, A = 25)X have the:
A
Same atomic mass
B
Same number of neutrons
C
Same nuclear charge
10) (Z = 14, A = 27)X and (Z = 14, A = 28)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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