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Chemistry > Unit 2 Key Words > Flashcards

Unit 2 Key Words Flashcards

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1
Q

Molecular formula

A

Actual number of atoms in a molecule

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2
Q

General formula

A

Simplest algebraic formula of a member of a homologous series

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3
Q

Structural formula

A

Minimal detail that shows the arrangement of atoms in a molecule

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4
Q

Displayed formula

A

Relative positioning of atoms and the bonds between them

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5
Q

Skeletal formula

A

Simplified organic formula

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6
Q

Homologous series

A

Series of organic compounds having the same functional group but with each successive member differing by CH2

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7
Q

Functional group

A

Group of atoms responsible for the characteristic reactions of a compound

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8
Q

Structural isomers

A

Compounds with the same molecular formula but different structural formula

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9
Q

Stereoisomers

A

Compounds with the same structural formula but with a different arrangement of atoms in a space

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10
Q

E/Z isomerism

A

Example of stereoisomerism

Restricted rotation around the double C=C bond

Two different groups attached to each carbon around the double bond

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11
Q

Homolytic fission

A

Breaking of a covalent bond to form two radicals

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12
Q

Heterolytic fission

A

Breaking of a covalent bond to form two ions, a cation and an anion

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13
Q

Hydrocarbon

A

A compound containing carbon and hydrogen only

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14
Q

Radical

A

Species with an unpaired electron

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15
Q

Electrophile

A

Electron pair acceptor

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16
Q

Nucleophile

A

Electron pair donor

17
Q

Standard enthalpy change of formation

A

Enthalpy change when one mole of compound is formed from its constituent elements in standard states and conditions

1 atmosphere pressure and 25*C

18
Q

Standard enthalpy change of combustion

A

Enthalpy change when one mole of substance reacts completely with oxygen under standard states and conditions

19
Q

Le Chatelier’s principle

A

When a system in dynamic equilibrium is subject to a change, the position of equilibrium will shift to minimise the change

20
Q

Empirical formula

A

Simplest whole number ratio of atoms of each element present in a compound

Chemistry (6 decks)

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