Oxidation Numbers and Ionic Compounds

What is the charge for an ion in group 1?

• +1
• -7
• -1
• +7

What is the charge of an ion in group 2?

• +2
• -6
• -2
• +6

What is the charge of an ion in group 13?

• +3

• -3

• -5

• +5

What is the charge of the mercury(II) ion?

• +11
• +2
• -2
• -11

What is the charge of the cobalt(IV) ion?

• +4
• -4
• +6
• +5

What is the charge of the iron(III) ion?

• +3
• -3
• +2
• +1

How do are charges (or oxidation numbers) determined for main group elements?

• It is based on the number of valence electrons, which is can be found with the group number.
• It is based on the number of  electrons, which is can be found with the atomic number.
• It is based on the number of  protons, which is can be found with the atomic number.
• It is based on the number of  neutrons, which is can be found with the atomic number and mass number.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of Na in Na⁺ ?

• 0
• +1/2
• +1
• -1

What element's don't have oxidation numbers?

• alkali metals
• noble gases
• halogens
• alkaline earth metals

What is the oxidation number of Magnesium (Mg)?

• +2
• -2
• whats an oxidation number