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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
mass number
C
electron dot diagram
D
atomic mass
2) isotopes of carbon 12 and carbon 14 they differ from one another by the number of
A
neutrons
B
quarks
C
electrons
D
protons
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
family
B
both family or group
C
period
D
group
5) Which of the three subatomic particles are neutral
A
protons
B
electrons
C
quarks
D
neutrons
6) Which of the three subatomic particles are positive
A
electrons
B
quarks
C
protons
D
neutrons
7) The central core of the atom is called the
A
neutrons
B
nucleus
C
protons
D
electons
8) An atom with 26 protons, 26, electons, and 30 neutrons has a mass number
A
30
B
26
C
56
D
52
9) Elements in groups 3 through 12 are called
A
noble gases
B
transitions elements
C
metalloids
D
isotopes
10) Atoms of the same element with a different number of neutrons are called
A
radiaoctive
B
metalloids
C
transition elements
D
isotopes
*select an answer for all questions
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