Cu(no3)2 + zn (s) → cu (s) + zn(no3)2 is an example of which type of reaction?
combustion
decomposition
single-displacement
double-displacement

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

it's c (engineer's do their work with mechanical stuff not on any living being)