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Atomic Structure - General Knowledge Questions
1 .
The total number of nucleons in the nucleus is called _________
A)
Electric charge
B)
Periodic number
C)
Atomic number
D)
Mass number

Correct Answer :   Mass number

2 .
An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of___
A)
5
B)
6
C)
8
D)
11

Correct Answer :   5

3 .
Which atom contains exactly 15 protons?
A)
S-32
B)
P-32
C)
O-15
D)
N-15

Correct Answer :   P-32

4 .
An element has an electronic configuration of 2, 8, 7. Its valency is
A)
1
B)
2
C)
3
D)
5

Correct Answer :   1

5 .
Which metal was used by Rutherford in his alpha-scattering experiment?
A)
lead
B)
silver
C)
gold
D)
platinum

Correct Answer :   gold

6 .
The electronic configuration of chlorine is
A)
2,8,8,7
B)
2,8,7
C)
2,7,8
D)
2,7

Correct Answer :   2,8,7

7 .
The atomic number of sodium is 11 and its mass number is 23. It has
A)
12 protons and 11 electrons
B)
12 electrons and 11 neutrons
C)
11 neutrons and 12 protons
D)
11 electrons and 12 neutrons

Correct Answer :   11 electrons and 12 neutrons

8 .
An alpha particle contains
A)
4 positive charge and 2 mass unit
B)
4 positive charge and 4 mass unit
C)
2 positive charge and 4 mass unit
D)
2 positive charge and 2 mass unit

Correct Answer :   2 positive charge and 4 mass unit

9 .
On which law is the nuclear energy explained?
A)
Einstein’s law
B)
Newton’s law
C)
Rutherford law
D)
Mendeleev law

Correct Answer :   Einstein’s law

10 .
The atom as a whole is electrically charged
A)
True
B)
False
C)
Can´t be determine
D)
None of the above

Correct Answer :   False