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WorksheetsCovalent Exam
Total questions: 25
Worksheet time: 24mins
How are atoms held together in covalent bonds?
By gaining and losing electrons
By sharing electrons
Which of the following has the highest melting point as a result of being an ionic compound?
O2
F2
Na2O
CCl4
Ethane is C2H6; it is made entirely of C-C and C-H bonds. What type of bonding is present in this molecule?
Ionic
Polar Covalent
Non-polar covalent
Metallic
What types of elements combine to form ionic bonds?
Metals and metalloids
Metals and non metals
Non metals only
Metalloids only
Metals only
When diatomic fluorine creates a molecule, what type of bond is used? (Hint, you may have to draw the Lewis structure)
Single bond
Double bond
Triple bond
What are atoms used to complete an octet but not used in bonding called?
Shared pair
Lone pair
Bonded pair
Which of the following is NOT one of the seven diatomic molecules?
Hydrogen
Carbon
Bromine
Iodine
Oxygen
When diatomic nitrogen creates a molecule, what type of bond is used? (Hint, you may have to draw the Lewis structure)
Single bond
Double bond
Triple Bond
What type of bond will N - H form?
Polar Covalent
Non-polar Covalent
Ionic
What shape will the molecule BH3 take on?
Bent
Trigonal Planar
Trigonal Pyramidal
Tetrahedral
Why does Xe participate in covalent bonding while Ne does not?
Ne is a diatomic element while Xe is not
Xe has lone pairs with additional repulsion
Xe can have an expanded octet
Ne has a sextet, not an octet
Which element is an exception to the octet rule?
Br
H
N
O
What type of bond is present in the compound Co3N?
Covalent
Ionic
What type of bond does NO2 have?
Ionic
Covalent
How many atoms of oxygen are in the compound Al2(SO4)3
2
3
4
7
12
How many electrons are shared between two atoms in a double covalent bond?
1
2
4
6
In a polar covalent bond, electrons are shared ____________ between two atoms.
equally
unequally
Which of the following has the greatest electronegativity?
O
S
Br
Si
Of the choices, which is the most polar bond?
N-S
N-F
N-Cl
N-Br
The compound CBr4 has a tetrahedral shape, what is the molecular polarity?
Polar
Nonpolar
What is the molecular geometry (shape) of NH3?
Bent
Trigonal Planar
Trigonal Pyramidal
Tetrahedral
Linear
What is the correct molecular geometry AND molecular polarity of HCN?
Tetrahedral, nonpolar
Tetrahedral, polar
Bent, polar
Linear, polar
Linear, nonpolar
Which of the following bonds is the most polar?
O-F
N-F
H-F
S-F
When drawing the structure of diatomic oxygen (O2), what type of bond is used?
single
double
triple
quadruple
What is the name of XeF4?
Xenon fluoride
Xenon tetrafluoride
tetraXenon tetrafluoride
monoXenon fluoride
