Nuclear reaction or chemical reaction

AI Thread Summary
The reaction between hydrogen and oxygen to form water is classified as a chemical reaction, not a nuclear reaction. Chemical reactions involve the transformation of substances without altering their atomic nuclei, preserving element identities. In the case of combustion, the hydrogen and oxygen molecules react explosively, resulting in water while maintaining their elemental forms. Nuclear reactions, in contrast, involve changes in the nucleus and can create new elements. Therefore, the combustion of hydrogen with oxygen is definitively a chemical reaction.
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If you light a match to a mixture of oxygen and hydrogen which then reacts explosively to form water. Is it a chemical or nuclear reaction?

I know a chemical reaction is one in which a substance is changed into one or more new substances.

A nuclear reaction is one in which a new element can be made with different proton and neutron numbers.

I think from the above to would say the reaction is Nuclear and not chemical.
Please shed some light
 
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In combustion of hydrogen with oxygen

2 H2 + O2 -> 2 H2O

The element identities are preserved.

Now is it nuclear or chemcial?
 
From the equation I would say the reaction is a chemical one.
 

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