BIOCHEM EXAM 3
which two electron configurations represent elements that would have similar chemical properties?
(2) and (4)
how many valence electrons do the halogens possess
7
the vertical height of a wave is called
aamplitude
identify a characteristic of halogens
powerful oxidizing agents
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 x 10^-18 J
determine the energy change associated with the transition from n = 2 to n= 5 in the hydrogen atom.
+4.58 x 10^-19 J
calculate the energy change associated with the transition from n = 4 to n = 1 in the hydrogen atom
-2.04 x 10^-18 J
determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom
-3.03 x 10^-19 J
how many unpaired electrons are there in the ground state of Cl?
1
how many valence electrons do the alkali metals possess?
1
during a thunderstorm, you see a flash of lightning. five seconds later, you hear the thunder. how far away is the storm?
1 mile
it is possible to determine the ionization energy for the hydrogen using the Bohr equation. calculate the ionization energy (in kJ) for a mole of hydrogen atoms, making the assumption that ionization is the transition from n = 1 to n = ∞.
1.31 x 10^3 kJ
give the number of core electrons for S
10
what total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 x 10^14 Hz?
110 kJ
determine the mass of a ball with a velocity of 45.0 m/s and a wavelength of 8.92 x 10^-34 m
16.5 g
which of the following is the electron configuration of an excited state of oxygen atom?
1s2 2s2 2p3 3s1
concerning the electron configuration of sulfur 1s2 2s2 2p6 3s2 3p4, which of the following represents the core electrons only?
1s2 2s2 2p6
give the ground state electron configuration for F-
1s2 2s2 2p6
when fulling degenerate orbitals, electrons fill them slightly first, with parallel spins. this is known as (the)
Hund's rule
Which one of the following elements forms a stable 1- anion?
I
place the following in order of increasing metallic character: Rb, Cs, K, Na
Na < K < Rb < Cs
Place the following elements in order of increasing atomic radius. S, Te, O.
O < S < Te
the condensed electron configuration of gallium, element 31, is __________.
[Ar] 3d10 4s2 4p1
choose the ground state electron configuration for Cr3+
[Ar] 3d3
the electron configuration of a ground-state copper atom is
[Ar] 4s1 3d10
give the ground state electron configuration for Se
[Ar] 4s2 3d10 4p4
which, if any, represents the ground state electron configuration for the selenium atom?
[Ar] 4s2 3d10 4p4 or 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
give the ground state electron configuration for Sr
[Kr] 5s2
the ground-state electron configuration for an atom of indium is
[Kr] 5s2 4d10 5p1
give the ground state electron configuration for Te.
[Kr] 5s2 4d10 5p4
give the ground state electron configuration for Pb
[Xe] 6s2 4f14 5d10 6p2
which of the following is the ground-state electron configuration of Ir?
[Xe] 6s2 4f14 5d7
how many valence electrons do the alkaline earth metals posses?
2
what value of 1 is represented by a d orbital?
2
calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm.
2.83 x 10^-19 J
an FM radio station broadcasts electromagnetic radiation at a frequency of 101.2 MHz. the wavelength of this radiation is ___________m.
2.964
determine the velocity of a marble (m = 8.11 g) with a wavelength of 3.46 x 10^-33 m
23.6 m/s
what value of 1 is represented by a f orbital?
3
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 x 10^3 kJ/mol.
7.87 x 10^15 Hz
how many valence electrons do the noble gases possess?
8
what is the binding energy (in J/mol or kJ/mol) of an electron in a metal whose threshold frequency for photoelectrons is 2.50 x 10^14/s?
99.7 kJ/mol
which of the following make an isoelectronic pair: Cl-, O2-, F, Ca2+, Fe3+?
Cl- and Ca2+
place the following elements in order of decreasing atomic radius. Xe, Cs, Ne.
Cs > Xe > Ne
choose the ground state electron configuration for Zn2+
[Ar] 3d10
identify the p-block element
Te
electromagnetic radiation with a wavelength of 575 nm appears as yellow light to the human eye. the energy of one photon of this light is 3.46 x 10^-19 J. Thus, a laser that emits 1.3 x 10^-2 J of energy in a pulse of light at this wavelength produces __________ photons in each pulse.
3.8 x 10^16
how many of the following elements have 2 unpaired electrons in the ground state? C, S, Zr, Si
4
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 x 10^14
calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm.
4.85 x 10^19 J
How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?
4.99 x 10^23 photons
give the number of core electrons for Cd
46
how much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 670 nm, contain?
536 kJ
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
place the following in order of increasing IE1: N, F, As
As < N < F
electrons filling up the orbitals from low to high is known as (the)
Aufbau principle
Which ion is isoelectronic with Ar?
CA2+
which element has the ground-state configuration [Xe] 6s2?
Eu
identify the f-block element
Gd
Place the following in order of decreasing metallic character: P, As, K
K > As > P
which one of the following pairs are isoelectronic?
K+ and Cl-
which reaction below represents the electron affinity of Li?
Li(g) + e- → Li-(g)
identify the elements correctly shown by decreasing radii size
N3- > N
identify the s-block element
Na
of the following, which atom has the largest atomic radius?
Na
Which element has the following ground-state electron configuration? [Kr]5s2 4d10 5p3
Sb
what period 3 element has the following ionization energies (all in kJ/mol)? IE1 = 1012. IE2 = 1900. IE3 = 2910. IE4 = 4960. IE5 = 6270. IE6 = 22,200
P
which one of the following elements forms a stable 3- anion?
P
identify the isoelectronic elements
P3-, S2-, C1-, K+, Ca2+
no two electrons can have the same four quantum numbers is known as (the)
Pauli exclusion principle
which of the following have their valence electrons in the same shell?
Rb, Sb, I
which reaction below represents the electron affinity of S?
S(g) + e- → S-(g)
which ion does NOT have a noble gas configuration in its ground state?
Sn2+
identify the element that has a ground state electronic configuration of [Kr] 5s2 4d5
Tc
Of the following, which atom has the smallest atomic radius?
Te
identify the d-block element
W
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.
Which of the following statements is TRUE?
atoms are roughly spherical because when all of the different shaped orbitals are overlapped, they take on a spherical shape
which of the following visible colors of light has the highest frequency?
blue
which element has the following ground-state configuration? [Ar]4s2 3d10 4p5
bromine
for the particular element, identify the species that has the smallest radius
cation
the element that corresponds to the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 3d5 is
chromium
Choose the statement that is TRUE
core electrons effectively shield outer electrons from nuclear charge
halogens can react with each other to form
covalent bonds
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 electronic transitions is consistent with an increase in energy?
from a 4s subshell to a 3d subshell
identify the noble gas that is used by researchers to cool down samples for analysis
helium
describe the reaction of the noble gases with metals
inert
on the electromagnetic spectrum, visible light is immediately between two other wavelengths. name them.
infrared and ultraviolet
a cation of +2 indicates that an element has
lost two electrons
which one of the following sets of quantum numbers is not possible?
n = 3, l = 0, ml = 1, ms = -1/2
give the set of four quantum numbers that could represent the electron gained to form the Br ION from the Br atom.
n = 4, l = 1, ml = 1, ms = -1/2
which of the following transitions (in a hydrogen atom) represent absorption of the smallest frequency photon?
n = 5 to n = 6
which of the following transitions (in a hydrogen atom) represent emission of the longest wavelength photon?
n= 5 to n = 4
what is the general valence-electron ground-state electron configuration for neutral alkali metals?
ns1
which of the following types of electromagnetic radiation has the lowest frequency?
orange
an element that has the valence electron configuration 5s2 5p5 belongs to which period and group?
period 5; group 7A
which of the following visible colors has the longest wavelength?
red
what are the possible orbitals for n = 3?
s, p, d
which of the following occurs as the wavelength of a photon increases?
the frequency decreases
which of the following occurs as the energy of photon increases?
the frequency increases
which of the following statements is TRUE?
the magnetic quantum number (ml) describes the orientation of the orbital
a proton is roughly 1800 times more massive than an electron. if a proton and an electron have the same kinetic energy,
the wavelength of the electron will be about √1800 times longer than the wavelength of the proton
a sunburn is caused by overexposure to ___________ radiation.
ultraviolet
using the figure below, categorize electromagnetic radiation with an energy of 6.7 x 10^-18 J/photon.
ultraviolet
describe the reaction of the alkali metals with non-metals
vigorous
which of the following colors of electromagnetic radiation has the shortest wavelength?
violet
place the following types of electromagnetic radiation in order of decreasing energy. visible light, radio waves, infrared light
visible light > infrared light > radio waves
the distance between adjacent crests is called
wavelength
__________ is/are used to image bones and internal organs.
x-rays
place the following types of electromagnetic radiation in order of increasing wavelength. visible light, x-rays, microwaves.
x-rays < visible light < microwaves
