WHSAD
Mr. Quinn and Ms. Tom
10/25/13

1.
2.
3.
4.
An orbital is defined as a region of the most
probable location of
an electron
a neutron
a nucleus
a proton

1.
2.
3.
4.
Which phrase describes an atom?
a positively charged electron cloud surrounding a
positively charged nucleus
a positively charged electron cloud surrounding a
negatively charged nucleus
a negatively charged electron cloud surrounding a
positively charged nucleus
a negatively charged electron cloud surrounding a
negatively charged nucleus

1.
2.
3.
4.
Which statement
radiation?
It has a mass of
It has a mass of
It has a mass of
It has a mass of
best describes gamma
1
0
0
4
and
and
and
and
a
a
a
a
charge
charge
charge
charge
of
of
of
of
1.
–1.
0.
+2.

1.
2.
3.
4.
Which statement about one atom of an
element identifies the element?
The atom has 1 proton.
The atom has 2 neutrons.
The sum of the number of protons and
neutrons in the atom is 3.
The difference between the number of
neutrons and protons in the atom is 1.

1.
2.
3.
4.
Which elements are present in this
mixture?
E and D, only
E and G, only
D and G, only
D, E, and G

1.
2.
3.
4.
Which group of atomic models is listed in
historical order from the earliest to the
most recent?
hard-sphere model, wave-mechanical
model, electron-shell model
hard-sphere model, electron-shell model,
wave-mechanical model
electron-shell model, wave-mechanical
model, hard-sphere model
electron-shell model, hard-sphere model,
wave-mechanical model

1.
2.
3.
4.
Radiation is spontaneously emitted from
hydrogen-3 nuclei, but radiation is not
spontaneously emitted from hydrogen-1
nuclei or hydrogen-2 nuclei. Which
hydrogen nuclei are stable?
nuclei of H-1 and H-2, only
nuclei of H-1 and H-3 only
nuclei of H-2 and H-3 only
nuclei from H-1, H-2, and H-3

1.
2.
3.
4.
What is the charge of the nucleus of an
oxygen atom?
0
–2
+8
+16

1.
2.
3.
4.
Which atom in the ground state has an
outermost electron with the most energy?
Cs
K
Li
Na

1.
2.
3.
4.
What is the total number of orbitals
containing only one electron in an atom of
nitrogen in the ground state?
1
2
3
4
1
2
3
4

1.
2.
3.
4.
As a result of the gold foil experiment, it was
concluded that an atom
contains protons, neutrons, and electrons
contains a small, dense nucleus
has positrons and orbitals
is a hard, indivisible sphere

1.
2.
3.
4.
Which electron configuration represents an
atom of aluminum in an excited state?
2-7-4
2-7-7
2-8-3
2-8-6

1.
2.
3.
4.
What is the total number of sublevels that
contain electrons in the third principal energy
level of a nickel atom in the ground state?
1
2
3
4

1.
2.
3.
4.
After decaying for 48 hours, 1/16 of the
original mass of a radioisotope sample
remains unchanged. What is the half-life of
this radioisotope?
3.0 h
9.6 h
12 h
24 h

1.
2.
3.
4.
Atom X and atom Z are isotopes of the element
aluminum
Carbon
Magnesium
nitrogen

1.
2.
3.
4.
Which atom in the ground state has a partially
filled second electron shell?
hydrogen atom
lithium atom
potassium atom
sodium atom

1.
2.
3.
4.
An electron will emit energy in quanta when
its energy state changes from 4p to
5s
5p
3s
6p

1.
2.
3.
4.
An original sample of the radioisotope fluorine-21
had a mass of 80.0 milligrams. Only 20.0
milligrams of this original sample remain
unchanged after 8.32 seconds. What is the half-life
of fluorine-21?
1.04s
2.08s
4.16s
8.3s

1.
2.
3.
4.
The nucleus of an atom of cobalt-58 contains
27 protons and 31 neutrons
27 protons and 32 neutrons
59 protons and 60 neutrons
60 protons and 60 neutrons