What are the isotopes of
hydrogen?
1H, 2H,
and 3H
The average mass of a boron atom is
10.81. Assuming you were able to
isolate only one boron atom,
the chance that you would randomly
get one with a mass of 10.81 is
0%
Atoms of the same element
having the same atomic
number but different mass
numbers are called
isotopes
1.
Which pair has approximately the same mass?
A. a neutron and an electron
B. an electron and a proton
C. a hydrogen, 1H, and a deuterium, 2H, atom
D. a proton and a neutron
D. a proton and a neutron
The number of protons in the
nucleus of an atom is called
its
atomic number
32
16
For the element sulfur, S,
give the number of neutrons
16
What Kelvin temperature
reading equals 98.6°F?
310. K
Round 0.006781 to two
significant figures, and
express it in scientific notation.
6.8 x 10-3
Convert: 801 K = ?°C.
528
Round 281,472 to three
significant figures.
281,000
Convert: 4.96 kg = ? mg.
4.96 x 106
Anything that has mass and
volume is called
matter
An element is a collection of a
single kind of
atom
Sand on the beach is an
example of
a heterogeneous mixture
A chemist needs 25.0 g of
bromine for an experiment.
What volume should she use?
(Density of bromine
= 3.12 g/cm3.)
8.01 mL
Calculate the mass of a
rectangular solid that has a
3
density of 2.53 g/cm and
which measures 2.50 cm by
1.80 cm by 3.00 cm.
34.2 g
List the three main subatomic
particles.
electron; proton; neutron
The normal freezing point of water is
A. 273 K
B. 0°F
C. 373°C
D. 32°C
E. None of the above
A. 273 K
Which is larger, one calorie or
one joule?
one calorie
A chunk of sulfur has a volume of
3
7.73 cm . What is the mass of
this sulfur?
(Density of sulfur = 2.07 g/cm3.)
16.0 g
The process of boiling off the water
from a salt solution to recapture the
salt is a ____________ process.
physical
Calculate the heat given off when
177 g of copper cools from 155.0°C
to 23.0°C. (The specific heat
capacity of copper is 0.385 J/g °C.)
9.00 x 104 J
If iodine melts at 114°C and
boils at 184°C, what is its
physical state at 98°C?
solid
Assume that 372 J of heat is added to
5.00 g of water originally at 23.0°C. What
would be the final
temperature of the water? (Specific heat
capacity of water = 4.184 J/g °C.)
40.8°C
The heat of fusion of water is
334 J/g. Calculate the energy
required to melt 46.8 g of
water.
15.6 kJ
Which of the following is a chemical
change?
A. paper burning
B. sugar dissolving in water
C. water boiling
D. butter melting
E. gasoline evaporating
A. paper burning
What is the maximum number
of electrons that can be put
into the 4d subshell?
10
Identify the transition metal
that has 24 electrons as a +3
ion
Co
What is the maximum number
of electrons that can be put
into the 4f subshell?
14
Express the following in
scientific notation.
0.00832
8.32 x 10-3
The element with the electron
2
10
3
configuration [Kr]5s 4d 5p is
Sb
32
16
For the element sulfur, S,
give the number of electrons
16
Express the following in
scientific notation.
178,428
1.78248 x
5
10
How does magnesium
compare with sodium in terms
of the number of outer shell
electrons?
larger
Give the name and symbol for
the element that has mass
number 64 and 35 neutrons.
copper, Cu
State the maximum number of
electrons allowed in the
third principal energy level
18
Which color of visible light has the most
energy per photon?
A. red
B. yellow
C. violet
D. blue
E. green
C. violet
Which of the following is a reasonable criticism of the Bohr model of the
atom?
A. It does not adequately predict the ionization energy of the
valence electron(s) for elements other than hydrogen.
B. It does not adequately predict the line spectrum of hydrogen.
C. It makes no attempt to explain why the negative electron does
not eventually fall into the positive nucleus.
D. It does not adequately predict the ionization energy of the firstenergy-level electrons for one-electron species for elements other
than hydrogen.
E. It shows the electrons to exist outside the nucleus.
A. It does not adequately predict the ionization energy of the valence
electron(s) for elements other than hydrogen.
The lowest possible energy state of an
atom is called its __________ state.
A. neutral
B. base
C. excited
D. ground
E. None of the above
D. ground
A packet of energy of electromagnetic
radiation is called
A. a wavelength
B. a proton
C. a photon
D. a wave
E. None of the above
C. a photon
Write the electron
configuration for Se.
2
2
6
2
6
2
10
4
1s 2s 2p 3s 3p 4s 3d 4p
[Ar]4s23d104p4
or
What element has the electron configuration
[Xe]6s24f145d106p2?
A. Pb
B. Sn
C. Ba
D. Po
E. None of the above
A. Pb
The maximum number of
electrons allowed in each of
the d orbitals is
2