Chemistry Ch.5 Review For Test: Question Preview (ID: 22039)


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What is a region of high probability of finding an electron?
a) aufbau principle b) atomic orbital c) ground state d) electron configuration
What is the tendency of electrons to enter orbitals of lowest energy first?
a) ground state b) Pauli Exclusion principle c) Hund's Rule d) Aufbau principle
How does the energy of an electron change when the electron moves closer to the nucleus?
a) it stays the same b) it increases c) it decreases d) it doubles
What is the maximum number of electrons in the third principal energy level?
a) 8 b) 32 c) 2 d) 18
When an electron moves from a lower to a higher energy level, the electron
a) always doubles its energy b) absorbs a quantum of energy c) moves closer to the nucleus d) absorbs a continuously variable amount of energy
What types of atomic orbitals are in the second principal energy level?
a) s, p b) s, p, d, f c) s d) s, p, d
What is the number of electrons in the outermost energy level of a phosphorus atom?
a) 2 b) 6 c) 3 d) 5
What is the electron configuration of calcium?
a) 1s22s22p63s2 b) 1s22s22p63s23p64s1 c) 1s22s22p63s1 d) 1s22s22p63s23p64s2
How many unpaired electrons are in an oxygen atom?
a) 3 b) 0 c) 2 d) 1
Stable electron configurations are likely to contain
a) electrons with a clockwise spin b) unfilled s orbitals c) fewer electrons than unstable configurations d) filled energy sublevels
Which electron configuration of the 5d energy sublevel is the most stable?
a) 5d7 b) 5d10 c) 5d d) 5d8
Which color of visible light has the longest wavelength?
a) red b) violet c) blue d) green
Which of the following electromagnetic waves has the lowest frequencies?
a) gamma rays b) visible light c) x-rays d) microwaves
What is the electron configuration of a neutral atom of fluorine?
a) 1s22s22p4 b) 1s22s22p6 c) 1s22s22p5 d) 1s22s22p63s23p6
How many electrons are in the highest occupied energy level of a neutral rubidium atom?
a) 0 b) 1 c) 2 d) 3
What is the frequency of of ultraviolet light with a wavelength 3.29 x 10^-7 m? The speed of light is 3 x 10^8 m/s.
a) 9.1 x 10^15 Hz b) 9.1 x 10^1 Hz c) 1.1 x 10^-15 Hz d) 9.1 x 10^14 Hz
Which variable is directly proportional to frequency?
a) velocity b) energy c) wavelength d) position
The quantum mechanical model of the atom ____________.
a) defines the exact path of an electron around the nucleus b) was proposed by Niels Bohr c) involves the probability of finding an electron in a certain position d) none of the choices
How many unpaired electrons does a magnesium atom have?
a) 0 b) 1 c) 2 d) 3
How many valence electrons are in an iron atom?
a) 8 b) 2 c) 6 d) 4
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