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The halogens (group 17) have an oxidation number of -1, though the halogens below fluorine can have other oxidation numbers as well. Hydrogen can also have an oxidation number of -1 when it forms hydrides.

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Q: What element has -1 as an oxidation number?
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Related questions

What is the oxidation number for the f element?

In compounds fluorine, F, has an oxidation number of -1.


What is the oxidation number of each element in NaCl?

The oxidation number of Na in NaCl is +1, while the oxidation number of Cl in NaCl is -1.


What does the oxidation number of an element tell you?

The oxidation number tells you the "combining power" of that element. For example, if Cu has a 1+ oxidation number then it will combine with Cl in a 1:1 ratio, and result in CuCl. If Cu has an oxidation number of 2+, then it will combine with Cl in a 1:2 ratio, and result in CuCl2.


What are the oxidation number for Flouride?

The oxidation number for the ion fluoride Fl- is always -1 in compounds. If you meant the element fluorine F2, then the oxidation number is 0.


What element has an Oxidation number of plus 1 and - 1?

Hydrogen it depends on the other element if it is part of a compound


Can the oxidation number of an element change?

Yes, it can. When the element loses electron, the oxidation number increases and when it gains electron, the oxidation number decreases.


What is the oxidation number of each element NaCl?

Na: +1 Cl: -1


What is the oxidation state of an element?

In chemistry, the oxidation state is a number assigned to an element as an indicator of the degree of oxidation of an atom in a chemical compound."The charge an element would have if it were an ion "Oxidation state is the same as the oxidation number. It is an indicator of the degree of oxidation of an atom in a chemical compound.


What is the oxidation number of oxygen?

the answer is -2.Related Information:The oxidation number of oxygen when it appears as an element is 0. The oxidation number in all compounds but peroxides is -2. The oxidation number of oxygen in peroxides is -1.


What is the oxidation number to each element FeCl3?

It contains only two elements. Fe shows +3 number. Chlorine shows -1 as the oxidation number.


What is the oxidation number for the element hydrogen?

+1 in most of the compounds -1 in metal hydrides


Which element has largest oxidation number?

Manganese is a metal element. It shows the largest oxidation number.