chem exam chapter 6
What element is represented by the electron configuration 1s22s22p63s23p64s23d104p65s14d10?
Ag
If one electron is added to the outer shell of chlorine, to which element would the configuration be similar?
Argon
In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed? n l ml A 3 0 0 B 3 1 -1 C 3 2 2 D 3 2 -1 E 3 3 2
E
Atomic orbitals that have the same amount of energy are ______________.
degenerate
"No two electrons in an atom can have the same four quantum numbers" is a statement of
the Pauli exclusion principle.
___________ is the quantum number which describes the shape of an atomic orbital.
the angular momentum quantum number
The shape of an atomic orbital is associated with
the angular momentum quantum number (l).
What is the electron configuration for tungsten?
1s22s22p63s23p64s23d104p65s24d105p66s24f145d4
The number of orbitals in a d subshell is
5
What is the frequency of electromagnetic radiation with wavelength 532 nm? (c = 3.00 × 108 m/s)
5.64 × 1014 s-1
What is defined as the number of waves that pass through a particular point in one second?
Frequency
A neutral atom in its ground state contains 28 electrons. This element is considered a __________ element, and has _______ electrons in orbitals with l = 2.
transition, 8
What is defined as the distance between identical points on successive waves?
wavelength
De Broglie explained electron movements by relating them to
waves and particles.
When n = 1 then l = __________
0
Electrons in an orbital with l = 3 are in a/an
f orbital
The size of an atomic orbital is associated with
the principal quantum number (n).
The orbital diagram for a ground-state carbon atom is 1s 2s 2p A ↿⇂ ↿⇂ ↿⇂ B ↿⇂ ↿ ↿ ↿ ↿ C ↿⇂ ↿⇂ ↿ ↿ ↿ D ↿⇂ ↿⇂ ↿ ↿ E ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿
D
What is the emission of light at only specific wavelengths?
Line spectra
Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to the greatest energy.
radio, infrared, ultraviolet, gamma rays
When l = 1 then ml can be __________
-1, 0, or +1
What is the electron configuration for silicon?
1s22s22p63s23p2
What is the electron configuration for bromine?
1s22s22p63s23p64s23d104p5
What is the wavelength of radiation that has a frequency of 6.912 × 1014 s-1? (c = 3.00 × 108 m/s)
4.337 × 102 nm
Calculate the frequency of visible light having a wavelength of 686 nm. (c = 3.00 × 108 m/s)
4.37 × 1014 s-1
Which of the following subshells has the highest energy in the element tantalum?
4f
How many electrons are in the 4d orbitals of Tc?
5
A radio wave has a frequency of 8.6 × 108 Hz. What is the energy of one photon of this radiation? (h = 6.63 × 10-34 J • s)
5.7 × 10-25 J
How many electrons are there in the 2nd principal energy level (n = 2) of a phosphorus atom?
8
What is the frequency of light having a wavelength of 360 nm? (c = 3.00 x 108 m/s)
8.3 × 1014 s-1
A photon has an energy of 5.53 × 10-17 J. What is its frequency in s-1 (h = 6.63 × 10-34 J • s)?
8.34 × 1016 s-1
The orbital diagram for a ground-state nitrogen atom is 1s 2s 2p A ↿⇂ ↿⇂ ↿ ↿ ↿ B ↿⇂ ↿ ↿⇂ ↿ C ↿⇂ ↿⇂ ↿⇂ ↿ D ↿⇂ ↿⇂ ↿⇂ ↿ ↿ E ↿⇂ ↿⇂ ↿⇂ ↿⇂ ↿
A
A possible set of quantum numbers for the last electron added to complete an atom of germanium in its ground state is n l ml ms A 4 0 0 +1/2 B 3 0 +1 -1/2 C 4 1 0 +1/2 D 3 1 +1 -1/2 E 4 2 +2 -1/2
C
Which one of the following sets of quantum numbers can correctly represent a 3p orbital? A B C D E n = 3n = 1 n = 3n = 3 n = 3 l = 1 l = 3 l = 2 l = 1 l = 0 ml = 2ml = 3ml = 1ml = -1 ml = 1
D
If n = 2 then l = 0, -1, and 1.
FALSE
Which element has the following ground-state electron configuration? 1s2 2s2 2p6 3s2
Mg
The electronic structure 1s22s22p63s23p64s23d8 refers to the ground state of
Ni
Electrons will not pair in degenerate orbitals if an empty orbital is available and, according to Hund's rule, the degenerate orbitals must all contain one electron before any of them can contain two electrons.
TRUE
The frequency of a photon is inversely proportional to the wavelength of the radiation.
TRUE
The principal quantum number designates the size of the orbital.
TRUE
___________ is the quantum number which describes the shape of an atomic orbital.
The angular momentum quantum number
What is defined as the vertical distance from the midline of a wave to the top of the peak or the bottom of the trough?
amplitude
Atomic orbitals developed using quantum mechanics
describe regions of space in which one is most likely to find an electron.
According to scientist James Clerk Maxwell in the year 1873, a(n) ______________ consists of an electric field component and a magnetic field component.
electromagnetic wave
_____________ is directly proportional to the frequency of a wave.
energy
According to the Aufbau principle, the most stable arrangement of electrons places them in degenerate orbitals with the same spin.
false
Select the arrangement of electromagnetic radiation which starts with the shortest wavelength and increases to longest wavelength.
gamma rays, ultraviolet, infrared, radio
List the following types of radiation from lowest frequency to highest frequency: microwave, X ray, ultraviolet, visible, and infrared
microwave < infrared < visible < ultraviolet < X ray
Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?
n = 3, l = 2, ml = -2
In the ___________, electrons are ejected from the surface of a metal exposed to light of a certain minimum frequency.
photoelectric effect
The orientation in space of an atomic orbital is associated with
the magnetic quantum number (ml).
The energy of an electron in the hydrogen atom is determined by
the principal quantum number (n) only.
___________ is the quantum number which describes the size of an orbital.
the principle quantum number