Molecules and Chemical Nomenclature

By taking this quiz, you should be able to define a molecule, name simple molecules based on their formulas, and determine a formula of a molecule based on its name.
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Questions #: 18
Time: 10 minutes
Pass Score: 80.0%
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The smallest part of a substance that has the physical and chemical properties of that substance

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A molecule with only two atoms is called _______ molecules

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A formal listing of what and how many atoms are in a molecule

two words

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The molecular formula for elemental hydrogen

The molecular formula for elemental hydrogen H2 with H being the symbol for and the subscript 2 implying that there are atoms of this element in the molecule.

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hydrogen
oxygen
nitrogen
two
three
four
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Select the diatomic elements from the following list

Hydrogen
Oxygen
Nitrogen
Helium
Fluorine
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It is assumed that there is only one atom in a formula if there is no numerical subscript on the right side of an element’s symbol.

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The connection between two atoms in a molecule

two words

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When nonmetals connect with other nonmetals, the compound typically do not exist as molecules

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A very specific system for naming compounds, in which unique substances get unique names

two words

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Simple molecules that have only two elements in them

two words

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Numerical Prefixes Used in Naming Molecular Compounds

The number of atoms of an element Prefix
1
2
3
4
5
6
7
8
9
10
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hepta-
di-
tri-
tetra-
penta-
mono-
deca-
hexa-
octa-
nona-
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What do you call the following element

SO2

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What is the name of the following compound?

SO3

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What do you call the following element?

PO5

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What is the symbol of nitrogen trichloride?

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What is the symbol of diphosphorus pentoxide?

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Name each molecule

  1. (1) transparent PF3
  2. (2) transparent CO
  3. (3) transparent Se2Br2
  4. (4) transparent SF4
  5. (5) transparent P2S5
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phosphorus trifluoride
diselenium dibromide
sulfur tetrafluoride
carbon monoxide
diphosphorus pentasulfide
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Give the formula for each molecule

  1. (1) transparent carbon tetrachloride
  2. (2) transparent silicon dioxide
  3. (3) transparent trisilicon tetranitride
  4. (4) transparent disulfur difluoride
  5. (5) transparent iodine pentabromide
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SiO2
CCl4
Si3N4
IBr5
S2F2
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Explanation

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sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC

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