Question

Atomic number is the number of ____ in an atom and atomic mass is the number of ____ in an atom put together ​

Answer 1

Answer:

1. proton

2. proton and neutrons

Explanation:

pl mark brainliest answer

Answer 2

Answer:

atomic number is the number of protons in an atom and atomic mass is the number of protons and neutrons in an atom put together

Explanation:

Let's take hydrogen, the first element on the periodic table. It has the atomic number 1 since it is made out of one proton and has an electron orbiting it.

1.00794 is the atomic mass for hydrogen. This is approximately the mass of a hydrogen atom because the number of protons and neutrons change since it can bond to so many things, so we can say physicists are blindly guessing :)

I hope this helps!