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Chemistry > Foundations In Chemistry > Flashcards

Foundations In Chemistry Flashcards

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1
Q

What is relative isotopic mass

A

Mass of an atom compared with one twelfth of the mass of a carbon - 12 atom

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2
Q

Relative atomic mass

A

Weighted mean mass of an atom compared with one twelfth of a carbon - 12 atom

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3
Q

What is Relative molecular mass

A

Weighted mean mass of a molecule compared to one twelfth the mass of a carbon - 12 atom

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4
Q

What is Relative formula mass

A

Weighted mean mass of a formula unit compared with one twelfth the mass of a carbon. - 12 atom

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5
Q

What is the relative mass of an electron

A

1/1836

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6
Q

What does a mass spectrometer do

A

determine the mass of an atom or molecule, showing relative abundances of isotopes

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7
Q

Defenition of covalent bonding

A

Strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms

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8
Q

What are lone pairs

A

Pairs of electrons not involved in bonding

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9
Q

What is a dative covalent bond

A

Where A bonding pair of electrons had been provided solely by one atom

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10
Q

What has higher repulsion, lone pairs or bonding pairs

A

Lone pairs

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11
Q

Which occupies more space, bonding pairs or lone pairs

A

Lone pairs

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12
Q

What are the bond angles of a molecule that occupies a linear shape

A

180

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13
Q

What are the bond angles in a molecule with a tetrahedral shape

A

109.5

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14
Q

What are the bond angles in a molecule with a bent shape

A

104.5

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15
Q

What are the bond angles in a molecule with a trigonal shape

A

107

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16
Q

What are the bond angles in a molecule with a trigonal planar shape

A

120

17
Q

What are the bond angles in a molecule with an octahedral shape

A

90

18
Q

Definition of electronegativity

A

The ability of an atom to attract bonding electrons in a covalent bond

19
Q

What is meant by a non polar molecule

A

A molecule in which there is an equal pull on bonding electrons from either side and the bond is symmetrical

20
Q

Are molecules in a tetrahedral shape polar or non polar?

A

Non polar

Chemistry (1 decks)

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