Molecules and Chemical Nomenclature

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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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

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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

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two words

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Simple molecules that have only two elements in them

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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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SO₂

Sulfur trioxide

Sulfur dioxide

Sulfur nonaoxide

Sulfur tetraoxide

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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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PO₅

Phosphorus pentaoxide

Phosphorus pentoxide

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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) PF₃
(2) CO
(3) Se₂Br₂
(4) SF₄
(5) 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

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(1) carbon tetrachloride
(2) silicon dioxide
(3) trisilicon tetranitride
(4) disulfur difluoride
(5) iodine pentabromide

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SiO₂

CCl₄

Si₃N₄

IBr₅

S₂F₂

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The smallest part of a substance that has the physical and chemical properties of that substance

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Explanation

A molecule with only two atoms is called _______ molecules

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Explanation

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

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The molecular formula for elemental hydrogen

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Select the diatomic elements from the following list

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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

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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

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Explanation

Simple molecules that have only two elements in them

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Explanation

Numerical Prefixes Used in Naming Molecular Compounds

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Explanation

What do you call the following element

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What is the name of the following compound?

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What do you call the following element?

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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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Give the formula for each molecule

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