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1st Semester Exam 3
Test Description: Semester exam questions
Instructions: Answer all questions to get your test result.
1) The number of protons in an atom is called
A
atomic number
B
atomic mass
C
electron dot diagram
D
mass number
2) isotopes of carbon 12 and carbon 14 they differ from one another by the number of
A
neutrons
B
protons
C
electrons
D
quarks
3) the maximum number of electrons in the second energy level of an atom is
A
18
B
2
C
8
D
4
4) elements arranged in vertical columns in the periodic table are called
A
group
B
family
C
period
D
both family or group
5) Which of the three subatomic particles are neutral
A
electrons
B
neutrons
C
quarks
D
protons
6) Which of the three subatomic particles are positive
A
electrons
B
quarks
C
neutrons
D
protons
7) The central core of the atom is called the
A
electons
B
neutrons
C
nucleus
D
protons
8) An atom with 26 protons, 26, electons, and 30 neutrons has a mass number
A
30
B
26
C
52
D
56
9) Elements in groups 3 through 12 are called
A
metalloids
B
isotopes
C
transitions elements
D
noble gases
10) Atoms of the same element with a different number of neutrons are called
A
transition elements
B
metalloids
C
isotopes
D
radiaoctive
*select an answer for all questions
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