Module 6 - Electronic Structure of Atoms V5 Flashcards
Electromagnetic radiation refers to waves that move through a vacuum at the speed of light.
true
A nanometer is how many meters?
10-9
A wavelength refers to the number of waves passing through a given point in a specific amount of time.
false
A quantum is a fixed amount of the smallest amount of electromagnetic radiation that can be absorbed or released by an object.
true
Which of the following multiples of h\nu are allowed?
3 h/nu
The unit for energy is Hz.
false
Ground state is the highest energy state for an electron.
false
Each element has its own unique atomic emission spectrum.
true
Which scientist came up with the concept of principal quantum numbers?
Bohr
All orbitals that have the same values of n and l are known as e-shells.
false
An orbital is where electrons can be found inside an atom, each one having its own unique set of energies and shapes.
true
What does the quantum number “ml” represent?
the orientation of the orbital
The following energy diagram is drawn correctly.
false
The Aufbau principle states that electrons must fill orbitals of __________ energy before occupying orbitals of __________ energy.
lower; higher
A many-electron atom is an atom with two or more electrons.
true
Valence electrons are the electrons used in bonding.
true
What is the electron configuration for chlorine?
1s22s22p63s23p5
The electrons not involved in bonding are known as __________ electrons.
core
The speed of light is used to calculate…
wavelength and frequency.
All electromagnetic radiation is visible light.
false
Which type of radiation has the lowest energy?
red
Atoms move to a higher level when they__________energy and move to a lower level when they__________energy.
absorb; release
What is the wavelength (in meters) of blue light that has a frequency of 4.60 x 109 Hz?
0.0065m
Who is responsible for the explanation of the photoelectric effect?
Albert Einstein
Photons have a quantum amount of energy.
true
Based on the photoelectric effect, if you shine high-frequency light on a clean sheet of metal…
electrons are emitted from the metal
What is the energy of a photon with a frequency of 1.1 x 1026 Hz?
7.3 x 10-8
What is the energy of radiation with a wavelength of 3.4 x 10-5 meters?
5.842 x 10-21
Elements in the same period have the same atomic emission spectrum.
false
Based on Bohr’s model, which is the lowest energy level?
n = 4
While the__________quantum number tells the shape of the orbital, the __________quantum number tells the orientation of the orbital shape.
angular momentum; magnetic
As the principal quantum number, n, increases…
the number of orbitals increases.
What are the quantum numbers for an electron in the 3p orbital (+1 orientation)?
n = 3, l = 1, ml = 1
What are the quantum numbers for an electron in the 4d orbital (-2 orientation)?
n = 4, l = 2, ml = -2
The Pauli exclusion principle states that…
no two electrons can have the same four quantum numbers.
What element is represented by the following electron configuration? 1s22s22p63s23p5
chlorine
Planck concluded that objects…
absorb a fixed amount of energy.
The Aufbau principle states that orbitals of the lowest energy must be filled first.
true
Which list correctly shows visible light in increasing energy?
red, orange, green, violet
Which list correctly shows electromagnetic radiation in decreasing energy?
gamma, x-ray, visible light, infrared
Which form of electromagnetic radiation listed here has the highest energy?
x-ray
What is the speed for the constant c (speed of light constant)?
3.0 x 108 m/s
What is the wavelength (in meters) of blue light that has a frequency of 6.3 x 1014 Hz?
4.8 x10-7 meters
Within the equation E = hv, h stands for what?
Planck’s constant
Which of the following provides the best explanation for the photoelectric effect?
When light of a certain frequency is shined on a clean metal surface, electrons are emitted from the surface.
Within the equation E = hv, v stands for what?
frequency
What is the energy of a photon with a frequency of 3.8 x 1014 Hz?
2.5 x 10-19 J
What is the frequency of a photon whose energy is 9.2 x 10-18 joules?
1.4 x 1016 Hz
__________ refers to the generic lab for observing light being emitted from excited electrons within an atom.
a flame test
Line spectra observed through gaseous elements in a glass tube being sent energy in the form of electricity is…
an atomic emission spectrum.
Which of the following would give a continuous spectrum when its light is broken up by a prism?
sunlight
Which principal quantum number has the lowest energy?
n=1
An electron in its __________ can absorb energy and jump up to an __________.
ground state, excited state
What does the quantum number “l” represent?
the shape of the orbital
What specific orbital aligns with the following quantum numbers?
n=2
l = 0
ml = 0
2s
The following picture represents which orbital shape?
s
What are the quantum numbers for an electron in 3d orbital (+1 orientation)?
n=3, l = 2, ml = +1
What are the quantum numbers for an electron in 5p orbital (0 orientation)?
n=5, l = 1, ml = 0
The two quantum numbers for electron spin are…
-½ , and +½.
The Pauli exclusion principle states that no __________ electrons can have the same set of __________ quantum numbers.
2; 4
Identify the correct order for the following orbitals in order of lowest energy to highest energy for a many-electron atom: “4s, 2p, 3s, 5d, 4f, 6s.”
2p, 3s, 4s, 6s, 4f, 5d
The electron circled in the energy level diagram is found in the _________ energy level and has an electron spin of __________.
2; +½
A diagram showing relative energies of shells, subshells, and orbitals of a hydrogen or many-electron atom is a(n)…
energy level diagram.
How many valence electrons does carbon have? Carbon’s electron configuration is 1s22s22p2.
4
Fluorine has __________ paired electron(s) and __________ unpaired electron(s) in the 2p subshell.
2;1
Calcium has __________ valence electrons.
2
What element has the following electron configuration: 1s22s22p4?
oxygen
Potassium has __________ valence electron(s) and __________ core electron(s).
1;18
