Covalent Bonds
Naming Molecules
Molecular Structures
Molecular Shape
Electroneg./Polarity
100
Describe a covalent bond
Nucleus of one atom attracts the electrons of another atom, and they share one or more pairs of electrons
100
What is the formula for carbon tetraflouride?
CF4
100
Draw the Lewis structure for SH2
H-S:: l H
100
What is the molecular shape of HOF?
bent
100
Which atom is the negative end of the bond C-O?
O
200
What makes a molecule, a molecule?
Nonmetals are bonded covalently
200
Name the molecule N2F4
Dinitrogen tetraflouride
200
Draw the Lewis structure for the ion ClO2- (charge is 1 negative)
see teacher for answer
200
Predict the bond angle of BF3
120 degrees
200
Which bond is more polar, P-H or P-Cl?
P-Cl
300
Consider CO, CO2, and CH2O. In which molecule is the C-O bond strongest?
What is CO (triple bond)
300
Name the acid HClO2
What is Chlorous acid
300
Draw the Lewis structure for BF3, keeping in mind that it does not obey the octet rule.
see teacher
300
Predict the molecular shape of CF2Cl2
tetrahedral
300
Which of the following is the msot polar? a. C-H b. N-H c. Si-H d. O-H
c, a, b, d
400
What type of bond is a single bond likely to be, sigma, or pi?
What is Sigma
400
Write the formula for bromous acid
What is HBrO2
400
Draw two resonance structures for the polyatomic ion CHO2- (1 negative charge)
see teacher
400
What shape of molecule has the hybrid orbital sp3d?
trigonal bipyramidal
400
Is PCl5 polar?
No, it is nonpolar
500
Locate the sigmand pi bonds in the following molecule. O ll H-C-H
Single bonds- sigma bonds double bond- one sigma bond, one pi bond
500
Name the acid H2Se
What is hydroselenic acid
500
Which elements are capable of forming molecules in which an atom has an expanded octet and WHY? B, O, C, P, Se
P and Se- they are in period 3 or higher and therefore have the d sublevel available.
500
Identify the expected hybrid on the central atom for OF2
sp3
500
Which of the following compounds is NOT polar? a. H2S b. CCl4 c. SiH3Cl d. AsH3
b
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