Group 1 elements have an oxidation number of +1.
Elements that have a single oxidation number include group 1 elements (e.g. sodium, potassium) which have an oxidation number of +1, and group 2 elements (e.g. magnesium, calcium) which have an oxidation number of +2.
There is at least one oxidation number shared by all the elements in a periodic table column, but some of the elements may have more than one oxidation number and some of these additional oxidation numbers may not be possible for all the elements in a column.
+1 only for all elements (except for hydrogen) hydrogen can have +1 and -1 as their oxidation numbers.
The elements in column 13 of the periodic table (Group 13) typically have an oxidation number of +3 in their compounds. This includes elements such as boron, aluminum, gallium, indium, and thallium.
In the carbon group (Group 14), the elements have oxidation numbers of +4 for carbon, +2 or +4 for silicon, +2 or +4 for germanium, +2 or +4 for tin, and +2 or +4 for lead. The oxidation number can vary depending on the specific compound or ion that the element is part of.
Elements that have a single oxidation number include group 1 elements (e.g. sodium, potassium) which have an oxidation number of +1, and group 2 elements (e.g. magnesium, calcium) which have an oxidation number of +2.
There is at least one oxidation number shared by all the elements in a periodic table column, but some of the elements may have more than one oxidation number and some of these additional oxidation numbers may not be possible for all the elements in a column.
+1 only for all elements (except for hydrogen) hydrogen can have +1 and -1 as their oxidation numbers.
-1.
The elements in column 13 of the periodic table (Group 13) typically have an oxidation number of +3 in their compounds. This includes elements such as boron, aluminum, gallium, indium, and thallium.
In the carbon group (Group 14), the elements have oxidation numbers of +4 for carbon, +2 or +4 for silicon, +2 or +4 for germanium, +2 or +4 for tin, and +2 or +4 for lead. The oxidation number can vary depending on the specific compound or ion that the element is part of.
all the pure elements have zero oxidation state.....
Predominantly, the transition elements, but also hydrogen, nitrogen, and oxygen. Actually all elements that have reactions can have more than one oxidation number in the sense that their oxidation number is 0 when they are in pure form and usually is some other value when they are in compounds.
all the pure elements have zero oxidation state.....
Potassium and Lithium
Predominantly those in wide form periodic table column 16, especially oxygen and sulfur.
Because within a group, the elements all have the same number of valence electrons, so their "combining power" (oxidation number) is relatively the same. In a period, the number of valence electrons increases going left to right, so the "combining power" changes.