Classify the following as a molecular formula or Lewis structure.
CO2
PH3
N2O4
NH3
Molecular Formula
Lewis Structure
10 points
10
Question 2
2.
Classify the following elements as a metal or nonmetal.
sulfur
oxygen
hydrogen
iodine
tungsten
nickel
tin
copper
fluorine
carbon
Metal
Nonmetal
2 points
2
Question 3
3.
A structural formula shows the arrangement of the atoms in a molecule.
2 points
2
Question 4
4.
A central atom in a molecule is the one with the highest electron affinity.
2 points
2
Question 5
5.
Hydrogen can be a central atom.
2 points
2
Question 6
6.
The number of bonding pairs in a molecule is equal to the number of electrons.
2 points
2
Question 7
7.
To find the total number of electrons available for bonding in a positive ion, you should add the ion charge to the total number of valence electrons of the atoms present.
2 points
2
Question 8
8.
The electrons in a coordinate covalent bond are donated by both the bonded atoms.
2 points
2
Question 9
9.
Resonance occurs when more than one valid Lewis structure can be written for a molecule.
2 points
2
Question 10
10.
All resonance structures have at least one double bond.
2 points
2
Question 11
11.
Ozone is an example of a molecule that forms a resonance structure.
2 points
2
Question 12
12.
The carbon dioxide molecule contains two double bonds.
2 points
2
Question 13
13.
All electrons in an atom are available for bonding.
2 points
2
Question 14
14.
When carbon and oxygen bond, the molecule contains ten pairs of bonding electrons.
2 points
2
Question 15
15.
The formula for the nitrogen element is N2.
10 points
10
Question 16
16.
Rearrange so that each statement matches with the appropriate molecule.
Draggable item
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Corresponding Item
Odd number of valence electrons
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NO
More than one valid Lewis structure
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BF3
More than 8 electrons around central atom
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SF6
Contains two double bonds
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O3
Fewer than 8 electrons around an atom
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CO2
2 points
2
Question 17
17.
Extra Credit Review: name the following acid H2SiO3
2 points
2
Question 18
18.
Extra Credit Review: name the following acid H2S
2 points
2
Question 19
19.
Extra Credit Review: name the following acid H2C2O4