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Covalent Bonding
Test Description: Molecular review!!
Instructions: Answer all questions to get your test result.
1) Under normal conditions, fluorine is a gas and bromine is a liquid. This is because
A
bromine has weaker intermolecular forces than fluorine
B
fluorine has no intermolecular forces
C
bromine has stronger bonds
D
fluorine has weaker intermolecular forces than bromine
2) What happens when two chlorine atoms combine to form a molecule of chlorine?
A
A bond is broken and energy is absorbed
B
A bond is broken and energy is released
C
A bond is formed and energy is released
D
A bond is formed and energy is absorbed
3) Which molecule is nonpolar?
A
H2O
B
NH3
C
CO
D
CO2
4) As a bond between hydrogen and oxygen are formed, electrons are
A
shared to form a covalent bond
B
transferred to form an ionic bond
C
transferred to form a covalent bond
D
shared to form an ionic bond
5) Which compound contains both ionic and covalent bonds?
A
methane (CH4)
B
ammonia (NH3)
C
sodium nitrate (NaNO3)
D
potassium chloride (KCl)
6) An atom of which element has the greatest attraction for electrons in a bond with hydrogen?
A
chlorine
B
phosphorus
C
silicon
D
sulfur
7) Which of these elements does not exist as a diatomic molecule?
A
Ne
B
H
C
I
D
F
8) Which of the following elements can form diatomic molecules held together by triple covalent bonds?
A
fluorine
B
nitrogen
C
oxygen
D
carbon
9) What is the shape of ammonia (NH3)?
A
tetrahedral
B
trigonal pyramidal
C
trigonal planar
D
bent
10) What are the weakest attractions between molecules
A
ionic forces
B
dispersion (Van der Waals)
C
hydrogen bonds
D
covalent bonds
*select an answer for all questions
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