system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If all chemical reactions are the result of creation/termination of bonds between the electrons how is it that the number of protons identifies the chemical properties of an atom?
gpt
Number of protons decides the electron configuration of atoms. And so has the most significant impact on it's chemical properties.

But different isotopes (same proton number different mass) can have an impact but usually it just effects speed of reaction etc not major chemical properties since isotops share the same electron configuration.