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Atomic Structure 1
Test Description: Atomic Structure
Instructions: Answer all questions to get your test result.
1) What is the electron configuration of a sulfur atom in ground state?
A
2-6
B
2-4
C
2-8-6
D
2-8-4
2) The modern model of the atom shows that electrons are
A
combined with neutrons in the nucleus
B
located in a solid sphere surrounding the nucleus
C
found in regions called orbitals
D
orbiting the nucleus in fixed paths
3) Which subatomic particles are located in the nucleus of a neon atom?
A
electrons and neutrons
B
protons and neutrons
C
electrons and protons
D
electrons and positrons
4) The total mass of the protons in an atom of Au-198 is approximately
A
119 amu
B
277 amu
C
198 amu
D
79 amu
5) In a calcium atom in the ground state, the electrons with the least amount of energy are located
A
first electron shell
B
third electron shell
C
fourth electron shell
D
second electron shell
6) Which group of atomic models is listed in historical order from earliest to most recent?
A
electron-shell model, wave-mechanical model, hard-sphere model
B
hard-sphere model, electron-shell model, wave-mechanical model
C
hard-sphere model, wave-mechanical model, electron-shell model
D
wave-mechanical model, electron-shell model, hard-sphere model
7) An atom of argon rarely bonds to an atom of another element because an atom of argon has
A
22 neutrons
B
8 valence electrons
C
3 electron shells
D
2 electrons in the first energy level
8) Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom?
A
The nucleus is positive and the electron cloud is positive
B
The nucleus is positive and the electron cloud is negative
C
The nucleus is negative and the electron cloud is negative
D
The nucleus is negative and the electron cloud is positive
9) An atom of potassium-37 and an atom of potassium-42 differ in their total number of
A
electrons
B
neutrons
C
protons
D
positrons
10) What is the mass number of an atom that has 6 protons, 6 electrons, and 8 neutrons
A
12
B
20
C
6
D
14
*select an answer for all questions
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