Atomic Structure 1: Question Preview (ID: 2276)

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What is the electron configuration of a sulfur atom in ground state?
a) 2-4
b) 2-6
c) 2-8-4
d) 2-8-6

The modern model of the atom shows that electrons are
a) orbiting the nucleus in fixed paths
b) found in regions called orbitals
c) combined with neutrons in the nucleus
d) located in a solid sphere surrounding the nucleus

Which subatomic particles are located in the nucleus of a neon atom?
a) electrons and positrons
b) electrons and neutrons
c) electrons and protons
d) protons and neutrons

The total mass of the protons in an atom of Au-198 is approximately
a) 79 amu
b) 119 amu
c) 198 amu
d) 277 amu

In a calcium atom in the ground state, the electrons with the least amount of energy are located
a) first electron shell
b) second electron shell
c) third electron shell
d) fourth electron shell

Which group of atomic models is listed in historical order from earliest to most recent?
a) hard-sphere model, wave-mechanical model, electron-shell model
b) hard-sphere model, electron-shell model, wave-mechanical model
c) electron-shell model, wave-mechanical model, hard-sphere model
d) wave-mechanical model, electron-shell model, hard-sphere model

An atom of argon rarely bonds to an atom of another element because an atom of argon has
a) 8 valence electrons
b) 2 electrons in the first energy level
c) 3 electron shells
d) 22 neutrons

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 positive
d) The nucleus is negative and the electron cloud is negative

An atom of potassium-37 and an atom of potassium-42 differ in their total number of
a) electrons
b) protons
c) neutrons
d) positrons

What is the mass number of an atom that has 6 protons, 6 electrons, and 8 neutrons
a) 6
b) 12
c) 14
d) 20

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