What type of reaction would come from reactants Cu and O

Synthesis

Explanation:

Because the reactants aren't compounds, it has to be a synthesis reaction, in which Cu and O combine to make copper oxide.

h let me think

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

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