Chem 1100
How many of the following elements have 2 unpaired electrons in the ground state? C S Zr Si
4
Calculate the frequency of the red light emitted by a neon sign with a wavelength of 680 nm.
4.41 × 1014 s-1
Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye. The frequency of this light is ________ s-1.
4.688 ´ 10^14
Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of 1.33 ´ 10-35 m.
4.98 m/s
For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4p orbital to a 2s orbital in a hydrogen atom? The Rydberg constant is 1.097 ´ 10-2 nm-1.
486.2 nm
How many orbitals are there in the seventh shell?
49
For a hydrogen atom, which electronic transition would result in the emission of a photon with the highest energy?
4p -> 2s
What is the maximum number of d orbitals that are possible?
5
How many valence electrons does a neutral lanthanide atom have?
6
Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm.
6.17 x 10^14 s^-1
Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 ´ 103 kJ/mol.
68.0 nm
How many valence electrons do the halogens possess?
7
Determine the shortest frequency of light required to remove an electron from a sample of Ti metal if the binding energy of titanium is 3.14 ´ 103 kJ/mol.
7.87 ´ 101^5 Hz
Give the number of valence electrons for I-.
8
How many electrons are in the outermost shell of the Al3+ ion in its ground state?
8
How many valence electrons do the noble gases possess?
8
How many valence electrons does an atom of Ar possess?
8
Identify the number of valence electrons for Li
1
Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n = 2 and the atom absorbs a photon of light with a frequency of 4.57 ´ 1014 Hz.
3
How many different values of ml are possible in the 5p sublevel?
3
Identify the orbital. (X) ^z >y <x
D orbital
Which element has the ground-state electron configuration [Xe]6s2?
Eu
Which of the following species will have the highest ionization energy?
Fr+
When filling degenerate orbitals, electrons fill them singly first, with parallel spins. This is known as (the)
Hund's rule.
Identify the element with the highest density.
I
Of the following, which element has the highest first ionization energy?
I
Place the following in order of decreasing metallic character. P As K
K > As > P
Place the following in order of increasing atomic radius. Sr Li Ca
Li < Ca < Sr
Which reaction below represents the second ionization of Lr?
Lr+(g) ® Lr2+(g) + e-
Identify the correct values for a 1s orbital.
N= 1, l= 0, M1= 0
Identify the s-block element.
Na
Which of the following have the same number of valence electrons?
P, As, Sb
Identify the orbital. Zyx
Py orbital
Place the following in order of increasing IE1.
Rb < K < Ca
Which reaction below represents the electron affinity of S?
S(g) + e- ® S-(g)
Identify the species that has the smallest radius.
Sb+3
Choose the paramagnetic species from below. Xe Ti4+ None of the above is paramagnetic. All of the above are paramagnetic. Correct Answer Se
Se
Place the following in order of decreasing radius. Se Cl- Te2-
Te2- > Cl- > Se
Identify the d-block element.
W
Of the following, which element has the highest first ionization energy? Sn Te I Xe
Xe
Choose the ground state electron configuration for Cr3+.
[Ar]3d3
Give the ground state electron configuration for Rb+
[Kr]5s1
Give the ground state electron configuration for Cd.
[Kr]5s24d10
Give the ground state electron configuration for Te.
[Kr]5s24d105p4
Give the ground state electron configuration for the ion of Ba
[Kr]5s24d105p6
Which of the following quantum numbers describes the shape of an orbital?
angular momentum quantum number
Identify the color that has a wavelength of 480 nm.
blue
When an electric current is passed through a tube containing mercury, mercury atoms absorb some of the electrical energy and reemit it as a ________ color.
blue
When waves of equal amplitude from two sources are in phase when they interact, it is called
constructive interference
Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does NOT contain an error.
n = 4, l = 3, ml =+2
Which of the following transitions (in a hydrogen atom) represent absorption of the smallest frequency photon?
n = 5 to n = 6
Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does NOT contain an error
n = 5, l = 3, ml =-3
Which of the following types of electromagnetic radiation has the lowest frequency?
orange
An element that has the valence electron configuration 5s25p5 belongs to which period and group?
period 5; group 7A
Identify a characteristic of halogens.
powerful oxidizing agents
Identify the color of a flame test for lithium.
red
When an electric current is passed through a tube containing neon, neon atoms absorb some of the electrical energy and reemit it as a ________ color.
red
Of the following, which element has the highest first ionization energy?
silicon
Describe the shape of a 3s orbital.
spherical
A sunburn is caused by overexposure to ________ radiation
ultraviolet
The distance between adjacent crests is called
wavelength
________, used to destroy molecules within unwanted cells such as cancer cells, are called ionizing radiation.
x-rays and gamma rays
Identify the color of a flame test for sodium.
yellow
It is possible to determine the ionization energy for hydrogen using the Bohr equation. Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from n = 1 to n = ¥.
+2.18 * 1-^-18 J
Give the numbers for ml for a p orbital.
-1, 0, 1
Give the numbers for ml for a d orbital.
-2, -1, 0, +1, +2
Give the numbers for ml for an f orbital.
-3,-2,-1,0,1,2,3
Determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom.
-3.03 * 10^-19 J
For n = 3, what are the possible values for l?
0, 1, 2
What are the possible values of l if n = 4?
0, 1, 2, or 3
Calculate the wavelength of an electron (m = 9.11 ´ 10-28 g) moving at 3.66 ´ 106 m/s.
1.99 * 10^-10 m
What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 ´ 1014 Hz?
110 kJ
Give the ground state electron configuration for F-
1s22s22p6
Give the ground state electron configuration for Mg2+.
1s22s22p6
The complete electron configuration of silicon, element 14, is ________.
1s22s22p63s23p2
How many of the following species are diamagnetic? Cs Zr2+ Al3+ Hg2+
2
How many sublevels are contained in the second shell (n = 2) of a given atom?
2
How many unpaired electrons are present in the ground state Si atom?
2
How many valence electrons does an atom of Ca possess?
2
What value of l is represented by a d orbital?
2
Which of the following statements is TRUE?
An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.
Of the following, which element has the highest first ionization energy?
At
Electrons filling up the orbitals from low to high is known as (the)
Aufbau principle.
Which ionization process requires the most energy?
C3+(g) ® C4+(g) + e-
Which ionization process requires the most energy?
Cl+(g) ® Cl2+(g) + e-
Identify the most reactive alkali metal with water.
Cs
When waves of equal amplitude from two sources are out of phase when they interact, it is called
destructive interference
When a wave encounters an obstacle or a slit that is comparable in size to its wavelength, it bends around it. This characteristic is called
diffraction
A type of energy embodied in oscillating electric and magnetic fields is called
electromagnetic radiation
The number of cycles that pass through a stationary point is called
frequency
Which of the following occurs as the wavelength of a photon increases?
frequency decreases
Which of the following occurs as the energy of a photon increases?
frequency increases
Identify the noble gas that is used by researchers to cool down samples for analysis.
helium
The heat that is felt from a hot object is called ________ radiation.
infrared
Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Ne atom.
n = 2, l = 1, ml = 1, ms = -
Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Cl atom
n = 3, l = 1, ml = 1, ms = +
Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle) to the Zn atom.
n = 3, l = 2, ml = 2, ms = -
Give the set of four quantum numbers that could represent the electron lost to form the K ION from the K atom.
n = 4, l = 0, ml = 0, ms = +
Identify the correct values for a 4f orbital.
n = 4, l = 3, ml = -2
