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Alevel Chemistry OCR A > Module 4 Definitions > Flashcards

Module 4 Definitions Flashcards

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1
Q

General formula

A

Simplest algebraic formula for a member of a homologous series

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2
Q

Molecular formula

A

Number and types of atoms of each element in a molecules

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3
Q

Empirical formula

A

Simplest whole number ratio of atoms in a compound

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4
Q

Structural formula

A

Minimal detail that shows the arrangement of atoms in a molecul3

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5
Q

Displayed formula

A

Relative positioning of atoms and the bonds between them

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6
Q

Skeletal formula

A

Simplified organic formula shows by removing hydrogen and leaving a carbon skeleton and associated functions groups

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7
Q

Homologous series

A

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

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8
Q

Functional group

A

Group of atoms responsible for characteristic of a reaction

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9
Q

Alkyl groups

A

Of formula CnH2n+1

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10
Q

R

A

Used to represent alkyl groups or fragment s of compounds not involved in reactions

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11
Q

Aliphatic

A

Chain of carbons
Not aromatic
Can be alicyclic

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12
Q

Alicyclic

A

Cyclic of carbons
Not aromatic

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13
Q

Aromatic

A

Compound containing benzene ring

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14
Q

Saturated

A

Single C-C bonds only

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15
Q

Unsaturated

A

Prescense of multiple carbon bonds eg C=C or aromatic rings

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16
Q

Structural isomers

A

Compounds with same molecular formula but different structural formula

17
Q

Radical

A

Species with unpaired electron eg Cl•

18
Q

Sigma bonds

A

Overlap of orbitals directly between bonding atoms

19
Q

Pi bond

A

Sideways overlap of adjacent p orbitals above and below the bonding C atoms

20
Q

Stereoisomers

A

Compounds with same structural formula but with different arrangements in Space

21
Q

Electrophile

A

Electron pair acceptor

Alevel Chemistry OCR A (14 decks)

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