oxididation numbers Flashcards

1
Q

uncombined element

A

0

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2
Q

combined oxygen (with different element)

A

-2

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3
Q

combined hydrogen

A

+1

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4
Q

simple ion

A

charge on ion

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5
Q

combined fluorine

A

-1

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6
Q

H in metal hydrides

A
  • 1

e. g. NaH, CaH2

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7
Q

O in peroxides

A
  • 1

e. g. H2O2

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8
Q

O bonded to F

A

+2

F2O

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9
Q

what does loss of electrons mean

A

oxidation

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10
Q

what does gain of electrons mean

A

reduction

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11
Q

ON of H2

A

0 (any diatomic molecule is 0)

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12
Q

ON of H in 3H2O

A

+1 (just look at individual element, not number before or after it)

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