What type of reaction is al + pb(no3)2 —-> al(no3)3 + pb?

decomposition
synthesis
single replacement
double replacement
or
combustion

Single replacement, one atom takes the place of another. There’s one element and one compound and they switch

element + compound —> (and then either the +ions switch with each other or the -ions)

A+BC—> AC + B

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

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