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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QUESTION OF
Views #: 610
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

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two words

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The molecular formula for elemental hydrogen

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The molecular formula for elemental hydrogen H2 with H being the symbol for (1) and the subscript 2 implying that there are (2) 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

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volume_mute
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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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volume_mute
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The connection between two atoms in a molecule

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two words

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

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

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two words

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Simple molecules that have only two elements in them

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two words

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Numerical Prefixes Used in Naming Molecular Compounds

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The number of atoms of an element Prefix
1 (1)
2 (2)
3 (3)
4 (4)
5 (5)
6 (6)
7 (7)
8 (8)
9 (9)
10 (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

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volume_mute

SO2

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What is the name of the following compound?

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SO3

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What do you call the following element?

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volume_mute

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

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  1. (1) PF3
  2. (2) CO
  3. (3) Se2Br2
  4. (4) SF4
  5. (5) P2S5
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phosphorus trifluoride
diselenium dibromide
sulfur tetrafluoride
carbon monoxide
diphosphorus pentasulfide
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Explanation

Give the formula for each molecule

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

✕
0
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
Keywords
Year 10