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Q: How do you find the neutrons when you know the atominc number?
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What would you do if you wanted to know the number of neutrons in an atom of a given element?

Neutrons, like protons are considered to have a mass of about 1. To find the number of neutrons, subtract the atomic number from the atomic mass.


How do you find the atomic mass of an element if you don't know the number of neutrons?

It is not possible.


How do you figure out protons electrons neutrons?

Find the atomic number. That tells you the number of protons and electrons (in a neutral atom). Then find the atomic weight. The number of protons plus the number of neutrons will equal the atomic weight. So if you know the wt. just subtract the number of protons and you will have the number of 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


What does atomic 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 number of electrons in an atom if you know the number of protons and neutrons?

In a neutral atom, the number of electrons is equal to the number of protons of the nucleus.


What is the number of protons and neutrons in N?

The atomic number of nitrogen is 7. So there are 7 protons and 7 electrons. The number of neutrons depends on the isotope. N-14 has 7 neutrons. N-15 has 8 neutrons. Number of neutrons = Mass number - Atomic number.


How many neutrons are found in one atom of 40K?

I'm assuming you are referring to Potassium (K)-40. All Potassium has 19 protons, though there are many stable isotopes. Potassium-40 has 21 neutrons.


How many protons and neutrons in N-15?

The number after the "N", 15, is the mass number. The mass number is the sum of the number of protons and the number of neutrons. So, if you find a periodic table, you can find the atomic number, which is the same as the number of protons. Because the atomic number of nitrogen is 7, it has 7 protons. Then we take the mass number (protons + neutrons) and subtract the number of protons to find the number of neutrons. 15 - 7 = 8 neutrons in 15N.


The number of protons and neutrons in the nucleus is know as what?

This is the mass number.


How many neutrons are in sulfur 33?

19, because since you know sulfur has 16 protons because that's its atomic number. you do 35-16=19


how many neutrons in magnesium?

The "25" is the mass number, which is the sum of the number of neutrons and protons. We don't know how many neutrons there are, but we do know how many protons magnesium has. The atomic number of an element is the same as the number of protons, so locating a Periodic Table, magnesium is number 12, which means 12 protons. If mass number = number of protons + number of neutrons, then number of neutrons = mass number - number of protons (or atomic number). So 25 - 12 = 13 neutrons in 25Mg.