The number of protons plus the number of neutrons in an atom is equal to its

Uranium has the atomic number 92; its atoms contain 92 protons and 92 electrons. Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains.

(hope this helps ^^)

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )