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Polar Covalent Bonding
Test Description: Review electronegativity and polar covalent bonding
Instructions: Answer all questions to get your test result.
1) What is electronegativity?
A
How strongly an atom repels (pushes away) electrons
B
How much energy it takes to pull two atoms apart when they are held together by a covalent bond
C
How big an atom is
D
How strongly an atom pulls (attracts) electrons
2) What does it mean for a molecule to be POLAR?
A
The molecule has the same atoms on each side
B
The molecule has different partial charges on each side but its overall charge is still neutral
C
The molecule has an overall charge
D
The molecule is made of metals bonded to nonmetals
3) What is a molecule?
A
Two or more atoms held together by a metallic bond
B
Two or more atoms held together by a covalent bond
C
Two or more atoms held together by an ionic bond
D
Compounds that form of only one type of atom
4) Which atom is MORE electronegative?
A
C
B
S
C
F
D
H
5) Which of these molecules will be POLAR?
A
F2
B
HF
C
H2
D
O2
6) Which of these molecules will be NON-POLAR?
A
Br2
B
CCl4
C
HF
D
HBr
7) What happens to the electrons in a POLAR covalent bond?
A
The electrons are shared EQUALLY
B
The electrons are pulled closer to the MORE ELECTRONEGATIVE atom
C
The electrons are transferred to the nonmetal
D
The electrons are pulled closer to the LESS ELECTRONEGATIVE atom
8) What happens to the electrons in a POLAR covalent bond?
A
The electrons are shared EQUALLY
B
The electrons are stolen by the metal to form an anion
C
The electrons are stolen by the metal to form a cation
D
The electrons are shared UNEQUALLY
9) What happens to the electrons in a NON-POLAR covalent bond?
A
The electrons are pulled closer to the MORE ELECTRONEGATIVE atom
B
The electrons are pulled closer to the LESS ELECTRONEGATIVE atom
C
The electrons are shared EQUALLY
D
The electrons are shared UNEQUALLY
10) Which of the following atoms are the MOST electronegative?
A
Transition Metals
B
Halogens Only
C
Alkali Metals Only
D
F, Cl, Br, O, N
*select an answer for all questions
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