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WorksheetsPhysical Science Unit 8 - Elements and Bonds (Practice)
Total questions: 34
Worksheet time: 23mins
If the elements in a molecule are not sharing electrons equally, the molecule will be asymmetrical or ________.
nonpolar
polar
ionic
metallic
Which elements generally form an ionic bond?
metal and nonmetal
2 or more nonmetals
metal and metal
none of the above
Which elements generally form a covalent bond?
metal and nonmetal
2 or more nonmetals
metal and metal
none of the above
In chemical compounds, covalent bonds are formed when
the electronegativity difference between two atoms is very large
valence electrons are transferred between a metal and a nonmetal
pairs of electrons are shared between two nonmetal atoms
a sea of mobile electrons surrounds the cations
An ionic bond forms when:
Pairs of electrons are shared between two nonmetal atoms.
A sea of mobile electrons surrounds the cations.
Valence electrons are transferred between a metal and a nonmetal.
The electronegativity difference between two atoms is very large.
Which of the following is an ionic compound?
CH4
I2
LiBr
CO
Which of the following is a covalent compound?
CaO
NaCl
BaCl2
CO2
Predict the type of bond that will form between Be and F.
Ionic
Covalent
Metallic
Name the following covalent molecule: N₂O
nitrogen oxide
nitrogen (II) oxide
dinitrogen monoxygen
dinitrogen monoxide
Name the following covalent molecule: NF₃
nitrogen fluoride
mononitrogen trifluoride
nitrogen trifluoride
nitrogen (III) fluoride
Write the chemical formula for the following covalent compound: carbon tetrachloride.
CCl
C₄Cl
CCl₄
C(IV)Cl
Write the chemical formula for the following covalent compound: dinitrogen pentoxide.
N2O9
N2O6
N2O5
N2O8
What chemical formula results from bonding Al3+ with O2-?
Al2O3
Al3O2
Al3O6
Al6O3
What is the proper chemical formula for combining Al3+ and Cl-?
AlCl3
Al3Cl
AlCl
Al3Cl3
What is the formula for the ionic compound potassium sulfide?
KS3
K6S
K2S
KS2
Write the chemical formula for the ionic compound calcium chloride.
CaCl
Ca2Cl
CaCl2
Name the following ionic compound: NaF
nitrogen monofluoride
sodium fluoride
monosodium monofluoride
monosodium fluorine
Which family of metals is the most chemically reactive?
Alkali Metals
Transition Metals
Alkaline Earth Metals
Noble Gases
Which group has elements that do not combine with other elements?
group 2
group 16
group 17
group 18
How many covalent bonds does chlorine (Cl) typically form in molecules?
1
7
8
17
The elements in a column (group) of the periodic table...
have similar atomic numbers
start with the same letter
have similar properties
are not related in any way
Which group is the most reactive among the nonmetals?
Noble Gases
Carbon Group
Halogens
Transition Metals
Which of the following is a compound?
OH
Ag
Co
H
How many hydrogen and oxygen atoms are in one water molecule (H2O)?
1 hydrogen, 2 oxygen
2 hydrogen, 1 oxygen
1 of each
2 of each
Why are metals good conductors?
They have mobile electrons.
They have mobile atoms.
They have crystal structures that can rearrange.
They have mobile protons.
Malleability and ductility are characteristics of compounds with:
covalent bonds
metallic bonds
ionic bonds
polar covalent bonds
11. How many valence electrons in this structure?
2
7
17
not enough information to answer
How many valence electrons are shown in the diagram?
16
7
6
2
Which correctly defines valence electrons?
electrons that participate in chemical bonding
electrons located in the last energy level
both are correct
