Oxidation numbers

Question 1

an **element by itself ** always has an oxidation number of […]

Answer 1

zero

Question 2

what is a monatomic ion?

Answer 2

an ion made of only one atom

Question 3

the oxidation number of a monatomic ion is […]

Answer 3

the same as their ion charge

Question 4

group 1A always has an oxidation number of […]

Answer 4

group 1A always has an oxidation number of +1

Question 5

group 2a always has an oxidation number of […]

Answer 5

group 2a always has an oxidation number of +2

Question 6

halogens are usually […], BUT […] with oxygen

Answer 6

halogens are usually -1, BUT positive with oxygen

Question 7

the sum of oxidations for a neutral compouned will equal […]

Answer 7

zero

Question 8

the sum of oxidation numbers for a polyatomic ion will be […]

Answer 8

the ion charge

Question 9

the ON of fluorine is always […]

Answer 9

-1

Question 10

H is […] with nonmetals and […] with metals

Answer 10

H is +1 with nonmetals and -1 with metals

Question 11

O is usually […] but […] in peroxide (H2O2)

Answer 11

O is usually -2 but -1 in peroxide (H2O2)