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Cypark Unit 8 Bonding Flashcards | StudBud
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Cypark Unit 8 Bonding
Cypark Unit 8 Bonding
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Chemical Bonding Exam
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Which elements can form diatomic molecules joined by a single covalent bond?
Halogens and oxygen
Hydrogen
Halogens (F, Cl, Br, I)
Hydrogen and Halogens
2
How are the symbols placed on the water molecule?
δ- next to O and δ + next to one H
δ- next to H and δ + next to O
δ- next to H and δ - next to )
δ- next to O and δ + next to H's
3
Which statement best describes metallic bonds?
the sharing of electrons between metal atoms
a sea of electrons that move among metal cations
attraction between metal cations and metal anions
attraction between metal cations and nonmetal anions
4
In Lab CF
4
had polar bonds yet existed as a nonpolar molecule...why?
polar bonds only form diatomic molecules
none
bond polarities are too slight to make molecule polar
bond polarities cancel due to opposite directions
5
Who is in the running for the chemistry teacher of the year 2019?
Marks/Boughton
West/Irving
Cone
All the above
6
The shape and structure of Carbon dioxide is used by science to?
Compare to carbon monoxide and environmental conditions
Improve gasoline production
Predict properties of carbon dioxide
Improve climate changes
7
According to VSEPR theory which is correct?
4 pairs will result in tetrahedral
3 atoms around a central will be trigonal planar.
bent molecule will have unpaired electrons on cental
molecule with 3 atoms will always be linear
8
How could the electron dot formula be changed to make it correct?
Increase the charge on the Gallium ion to 6+
Add a complete octet of dots around the Gallium ion
Add another Gallium ion to the structure to balance charges
Move the dots representing electrons from the O to Ga ion
9
What electron configuration do atoms usually achieve electrons to form covalent bonds?
The configurations of noble gases
A configuration with any even number of valence electrons
A configuration with any odd number of valence electrons
Configurations with half filled s and p sublevels.
10
How do electronegativity values determine poloarity of a covalent bond?
More electronegative atom becomes slightly negagive
More electronegative atom becomes +1
More electronegative atom becomes slightly positive
More electronegative atom becomes -1
11
What side of water will move towards a negative charge?
oxygen
none
hygrogen
center
12
Which of the following diatomic molecules form a triple bond?
O2
F2
H2
N2
13
Which of the following has a tetrahedral shape?
Water (H2O)
Carbon dioxide (CO2 )
Ammonia (NH3)
Methane (CH4)
14
Why does a metallic bond have high thermal and electrical conductivity?
Cations absorb electromagnetic energy
Moving cations
Freely-moving electrons energy through metal
Tightly packed cations
15
Water is a bent molecule, which other will be bent?
CH4
SO2
H2S
All the above
16
Which pair of elements is likely to form an ionic compound and why?
Na and O
Cu and Ag
K and He
H and H
17
which of the following molecules are not one of the 7 diatomic molecule?
Nitrogen
Oxygen
Hydrogen
Sulfur
18
What is the correct lewis dot formation of NaCl?
A
B
C
D
19
All triple and double bond molecules have the following shape?
bent
linear
trigonal planar
tetrahedral
20
Which electron dot correctly illustrates the compound Calcium Fluoride?
B
C
D
A
21
What is the correct order of bond strength from greatest to least?
Ionic, Metallic and Covalent
Metallic, Ionic and Covalent
Covalent, Metallic and Ionic
Ionic, Covalent and Metallic
22
Which is a molecular formula of a diatomic molecule found in Earth's atmosphere?
C2
Ar
CO2
N2
23
What do scientist use VESPR theory for?
identify the strengths of bonds in molecules
to predict the three-dimensional shapes of molecules
to identify coordinate covalent bonds in molecules
to identify exceptions to the octet rule
24
The ball and stick model below shows the geometry of atoms in a molecule or ion
Methane (CH4)
Water (H2O)
Ammonia (NH3)
Carbon Dioxide (CO2)
25
Lithium and sulfur form an ionic compound. Which best describes electron arrangement?
8 dots & -2 on two S, no dots on two Li with +1
8 dots & -2 on S, no dots on one Li with +1
8 dots & -2 on three S, no dots on three Li with +1
8 dots & -2 on one S, no dots on two Li with +1
26
Which of the following is the correct lewis dot notation for the ionic bonding of Mg and Br?
A
D
C
B
27
Which statement best describes ionic bonds?
attraction between metal cations and metal anions
a sea of electrons that move among metal cations
one atom transfers electrons to another atom producing ions.
the sharing of electrons between two metal atoms
28
A triple bond, as observed in N
2
, represents a total of how many electrons?
4
2
6
3
29
Why do ionic compounds conduct electric current when they are melted or dissolved?
ions acquire a new charge
ions are free to move
ions become atoms
none of the above
30
How do the unshared pairs affect the bond angle?
they pull the bonding pairs farther apart
They push the bonding pairs closer together
they have no effect on the bonding pairs
they both push and pull the bonding pairs
