Question

A scientist wants to estimate the mass of an atom. What information can be used to do this?

The masses of the electrons and neutrons can be added together.
The atomic number of the element can be used.
The masses of the protons and neutrons can be added together.
The column number of the periodic table can be used.​

Answer 1

The masses of protons and neutrons added together

Step-by-step explanation:

The neutrons and protons are the only ones that have weight , the electron doesn't ( thats the reason they arent in the middle section )

Answer 2

is not C is "A" trust me took test

Step-by-step explanation:

The masses of the protons and neutrons can be added together.

even tho a look alike there is a major difference because its protons and electrons not neutrons, they dont have nothing to do with this