Match the element with the correct oxidation number.calcium metalF in NaFS in Cl in Ca in CaOa.+2b.–1c.+5d.+6e.0
Question
Match the element with the correct oxidation number.
- calcium metal
- F in NaF
- S in Cl
- Ca in CaO
Options:
- a. +2
- b. –1
- c. +5
- d. +6
- e. 0
Solution
Calcium metal (Ca) is in its elemental form, so its oxidation number is e. 0.
Fluorine (F) in Sodium Fluoride (NaF) always has an oxidation number of b. -1.
Sulfur (S) in Sulfur Hexafluoride (SF6) has an oxidation number of d. +6.
Chlorine (Cl) in Calcium Chloride (CaCl2) has an oxidation number of b. -1.
Calcium (Ca) in Calcium Oxide (CaO) has an oxidation number of a. +2.
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