The correct electron con guration of the O2 ion is A.
1s2 2s2 2p2
B.
1s2 2s2 2p3
C.
1s2 2s2 2p5
D. 1s2 2s2 2p6
Magnesium and calcium have similar chemical properties because a magnesium atom and a calcium atom have the same A.
atomic number
B.
mass number
C.
total number of electron shells
D. total number of valence electrons
2.
Which two atoms will form an ionic bond? A.
K and H
B.
C.
N and H
D. C and H
5.
I and H
What is represented by the dots in a Lewis electron-dot diagram of an atom of an element in Period 2 of the Periodic Table? A.
the number of neutrons in the atom
B.
the number of protons in the atom
C.
the number of valence electrons in the atom
D. the total number of electrons in the atom
3.
Which is the correct electron dot representation of an atom of sulfur in the ground state? A.
S:
.
B. . S :
.. C. . S. :
6.
.. D. : .. S:
page 1
The correct electron dot formula for hydrogen chloride is
..
A.
H : Cl
B. : H .. : Cl
C.
H : Cl .. :
D. : H : Cl :
..
..
7.
Which ion has the electron con guration of a noble gas? A.
Cu2+
B.
Fe2+
C.
Ca2+
11.
D. Hg2+
Which electron notation represents the valence electrons of a phosphorous atom in the ground state? A.
s ,
C.
s +
8.
A.
transferred from one atom to another
B.
captured by the nucleus
C.
mobile within a metal 12.
Which ion has the same electron con guration as an Mg2+ ion? A.
10.
B.
p z }| { , , )
D.
s , s ,
p z }| { ++ + p z }| { +, )
Covalent bonds are formed when electrons are
D. shared between two atoms
9.
p z }| { , + )
Ca2+
B.
Cl
C.
Na+
a covalent bond
B.
a coordinate covalent bond
C.
a hydrogen bond
A.
B.
C.
D.
D. S2
Which type of bond is formed by the transfer of electrons from one atom to another? A.
Which Lewis electron-dot diagram is correct for CO2 ?
13.
Which kind of bond is formed when two atoms share electrons to form a molecule? A.
ionic
B.
metallic
C.
electrovalent
D. covalent
D. an ionic bond
page 2
Unit 4 Study Guide 2015-16
14.
Which electron dot symbol represents an atom of chlorine in the ground state? A.
B.
C.
D.
18.
A.
19.
15.
The maximum number of electrons that may be found in the third principal energy level is
Which type of bond is found in a molecule of methane? A.
a covalent bond
B.
C.
an ionic bond
D. a metallic bond
2
C.
18
D. 32
5
B.
2
C.
3
D. 7
a hydrogen bond
The total number of orbitals in a d sublevel is A.
1
B.
5
C.
3
D. 7
Which molecule contains a triple covalent bond between its atoms? A.
N2
B.
O2
C.
F2
D. H2
21.
17.
B.
What is the total number of valence electrons in an atom of phosphorus in the ground state? A.
20.
16.
8
What is the total number of valence electrons in an atom with the electron con guration 1s2 2s2 2p6 3s2 3p3 ? A.
6
B.
2
C.
3
An element with a partially lled d sublevel in the ground state is classi ed as A.
a halogen
B.
a transition metal
C.
an alkali metal
D. an alkaline earth metal
D. 5
page 3
Unit 4 Study Guide 2015-16
22.
When an atom of sodium and an atom of uorine combine to form the salt, sodium uoride, an ionic bond, is formed. Which statement correctly describes the behavior of the valence electron in the ionic bond? A.
An electron from the uorine atom moves to the sodium atom forming two ions.
B.
An electron from the sodium atom moves to the uorine atom forming two ions.
C.
An electron from the uorine atom is shared with the sodium atom forming a sodium ion.
25.
Metals and nonmetals generally form ionic bonds with each other. Which of the following sets of elements will most likely for an ionic bond? A.
Na, F
B.
Cl, F
C.
Na, K
D. He, O
D. An electron from the sodium atom is shared with the uorine atom forming a uoride ion.
26.
23.
A.
When cations and anions join, they form what kind of chemical bond? A.
ionic
B.
C.
metallic
D. covalent
The chemical formula for ammonia is NH3 . Which of the following is the correct Lewis electron dot structure for ammonia?
hydrogen
B.
C.
24.
D.
Some of the molecules found in the human body are NH2 CH2 COOH (glycine), C6 H12 O6 (glucose), and CH3 (CH2 )16 COOH (stearic acid). The bonds they form are A.
nuclear.
B.
metallic.
C.
ionic.
D. covalent.
page 4
Unit 4 Study Guide 2015-16
27.
30.
Which of the following statements best explains why atoms bond? A.
Atoms bond to make new substances.
B.
Atoms bond to become less chemically stable.
C.
Atoms bond to change from a liquid to a solid.
Sara wants to know if lithium (Li) and bromine (Br) will bond. She uses the following table to nd the properties of the two elements.
D. Atoms bond to become more chemically stable.
Which statement describes the type of bond formed from these two elements?
28.
A.
Both Li and Br are metals that will form a metallic bond.
B.
Li is a metal and Br is a nonmetal that will form an ionic bond.
Which of the following are most directly involved in chemical bonding?
C.
Li is a nonmetal and Br is a metal that will form a covalent bond.
A.
protons
B.
D. Both Li and Br are transition metals that will form a metalloid bond.
C.
alpha particles
D. valence electrons
neutrons
31. 29.
Which part of an atom can be transferred in chemical reactions? A.
electron
B.
proton
C.
neutron
D. nucleus
Ionic and covalent compounds are alike in that they both— A.
form ions.
B.
share electrons.
C.
lose outer electrons.
D.
page 5
ll outer electron levels.
Unit 4 Study Guide 2015-16
32.
A.
33.
34.
Which compound is most likely formed using covalent bonds? SiO2
B.
K2 O
C.
KBr
D. CaBr2
Based on the VSEPR theory, what is the molecular geometry of a molecule of PI3 ? A.
linear
B.
C.
trigonal planar
D. trigonal pyramidal
35.
tetrahedral
page 6
What is the shape of a molecule which has two shared pairs of electrons and no unshared pairs? A.
tetrahedral
B.
bent
C.
trigonal planar
D. linear
Which of the following is a covalent compound? A.
CO2
B.
K2 O
C.
NaCl
D. MgCl2
Unit 4 Study Guide 2015-16
Problem-Attic format version 4.4.229 c 2011–2015 EducAide Software _ Licensed for use by Racquel Alle Terms of Use at www.problem-attic.com Unit 4 Study Guide 2015-16
