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Atomic number is determined by the number of protons, Atomic Mass is Protons + neutrons (electrons weigh less then 1/1800th of a proton which is so close to nothing that they are usually ignored at most levels) Neutrons and protons each have an atomic weight of 1, if you want to split hairs neutrons are a shade heavier then protons but again at most levels this is insignificant.

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What is atomic mass number minus protons?

atomic mass number - protons = number or neutrons


What does mass do?

The Atomic Mass is equal to the number of protons plus neutrons. So if you know the atomic number then you can find out the number of neutrons Atomic # is the amount of Protons or Electrons Atomic Mass- Number of protons plus neutrons Atomic Mass-Atomic Number = Amount of neutrons


How do you find the ratio of neutrons to protons?

The ratio of neutrons to protons in an atom can be calculated by subtracting the atomic number (number of protons) from the atomic mass (sum of protons and neutrons) of the atom. Mathematically, ratio of neutrons to protons = (Atomic mass - Atomic number).


What are counted in an an atom to determine mass number?

Atomic Mass: protons AND neutrons atomic number: just protons


What are the number of protons neutrons and electrons in an element?

Number of protons = Number of electrons = Atomic number Number of neutrons = Atomic number - Number of protons


What do we get while subtracting the atomic number from the atomic mass number?

We get the number of neutrons. Atomic number is the number of protons, and atomic mass is protons plus neutrons.


How do you determine the number of protons electrons and neutrons present in an element by identifying its atomic and mass numbers from the periodic table?

Atomic number means number of protons present in an atom. Atomic number= number of protons. mass number = number of neutrons+ number of protons. So if you subtract the number of protons you get neutrons and if you subtract neutrons you get protons. mass number - protons= neutrons Mass number - neutrons = protons.


Why can you subtract the atomic number from the atomic mass and get the number of neutrons?

Not the atomic mass but the mass number (of course, these values are similar - not identical).The mass number is the sum between the number of protons and the number of neutrons. As a consequence:Number of neutrons for an isotope = Mass number - Number of protonsThe number of protons is equal to the atomic number.


How many protons are in a lithium nucleus?

The atomic number of lithium is 3. Therefor there are 3 protons and neutron in the nucleus of lithium. Lithium also has 4 neutrons. atomic # = protons and neutrons neutrons = rounded atomic mass - atomic number Sources- 7th grade Acc. Science


What number is the atomic mass equal to?

The atomic mass of an element is equal to the sum of the number of protons and neutrons in its nucleus. It is not directly related to the atomic number, which represents the number of protons in an atom.


How are protons and neutrons different from and similar from each other?

Protons are positively charged Neutrons are negatively charged The number of protons is the atomic number Protons+Neutrons=Atomic weight


What equation tells you how to calculate the number of neutrons in an atoms?

This equation is:Mass number - number of protons = number of neutronsMass number is the sum of protons and neutrons and has a value near the Atomic Mass of an isotope.