FAQ

Do elements in the same group have the same oxidation number?

Do elements in the same group have the same oxidation number?

Ernest Z. The only consistent variation of oxidation numbers with the Periodic Table is that, in their compounds, Group 1 metals are always +1 and Group 2 metals are always +2.

What group has a oxidation number?

Determining oxidation states

Element Usual oxidation state Exceptions
Group 1 metals Always +1
Group 2 metals Always +2
Oxygen Usually -2 Peroxides and F2O (see below)
Hydrogen Usually +1 Metal hydrides (-1) (see below)

Where are the oxidation numbers on periodic table?

Many periodic tables have the oxidation numbers written on the squares inside the table. Otherwise for most elements look at the number of the family for at least one oxidation number.

Why do elements have different oxidation number?

An oxidation state shows how many electrons an atom would gain or lose if it were to bond with other atoms. Transition metals can have multiple oxidation states because of their electrons. This results in different oxidation states.

Why is an elements oxidation number related to the group on the periodic table to which it belongs?

Remember also that oxidation numbers describe the number of electrons an atom or ion gains or loses when forming compounds. Atoms in the same group on the periodic table usually will have the same oxidation number. Elements in Group 17 have seven electrons in the outer energy level and tend to gain one electron.

Is oxidation number and Valency same?

The key difference between valency and oxidation number is that valency is the maximum number of electrons an atom can lose, gain or share to become stable, whereas oxidation number is the number of electrons an atom can lose or gain to form a bond with another atom.

Do all elements have multiple oxidation states?

This is never exactly true for real bonds. So an atom can gain 1,2,3 or more electrons and also lose 1,2,3 or more electrons thereby causing it to gain a certain degree of oxidation or reduction. This explains why an element can have multiple oxidation states.

Can a compound have more than one oxidation number?

Some elements in the periodic table have only one oxidation number or two oxidation numbers. But some have lot of oxidation numbers. Oxidation number of element in a compound can be positive or negative or may be zero.

What is the oxidation number of an element?

The oxidation number of an atom is zero in a neutral substance that contains atoms of only one element. Thus, the atoms in O 2, O 3, P 4, S 8, and aluminum metal all have an oxidation number of 0.

What are the oxidation numbers of Group IA metals?

The metals in Group IA form compounds (such as Li3N and Na2S) in which the metal atom has an oxidation number of +1. 6. The elements in Group IIA form compounds (such as Mg3N2and CaCO3) in which the metal atom has a +2 oxidation number.

How are oxidation and reduction related to each other?

Oxidation and reduction are therefore best defined as follows. Oxidation occurs when the oxidation number of an atom becomes larger. Reduction occurs when the oxidation number of an atom becomes smaller. Determine which atom is oxidized and which is reduced in the following reaction

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