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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
fluorine has weaker intermolecular forces than bromine
B
bromine has stronger bonds
C
bromine has weaker intermolecular forces than fluorine
D
fluorine has no intermolecular forces
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 formed and energy is absorbed
C
A bond is formed and energy is released
D
A bond is broken and energy is released
3) Which molecule is nonpolar?
A
H2O
B
NH3
C
CO2
D
CO
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
potassium chloride (KCl)
B
methane (CH4)
C
sodium nitrate (NaNO3)
D
ammonia (NH3)
6) An atom of which element has the greatest attraction for electrons in a bond with hydrogen?
A
sulfur
B
silicon
C
chlorine
D
phosphorus
7) Which of these elements does not exist as a diatomic molecule?
A
F
B
H
C
I
D
Ne
8) Which of the following elements can form diatomic molecules held together by triple covalent bonds?
A
nitrogen
B
oxygen
C
fluorine
D
carbon
9) What is the shape of ammonia (NH3)?
A
trigonal planar
B
bent
C
tetrahedral
D
trigonal pyramidal
10) What are the weakest attractions between molecules
A
covalent bonds
B
ionic forces
C
hydrogen bonds
D
dispersion (Van der Waals)
*select an answer for all questions
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