Question

Number of protons and nutrons in elements

Answer 1

Answer:

The number of protons is the atomicnumber, and the number of protonsplus neutrons is the atomic mass. For hydrogen, the atomic number is 1 because there is one proton and noneutrons. For helium, it is 4: twoprotons and two neutrons.

Answer 2

Answer:

they are equal

as proton is equal to nutron.