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You subtract the atomic number from the mass number.

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14y ago

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Related Questions

How many neutrons are in one atom?

The number of neutrons in one atom can vary depending on the element. Neutrons are one of the three main subatomic particles found in an atom, along with protons and electrons. The number of neutrons in an atom is calculated by subtracting the number of protons (atomic number) from the atomic mass of the atom.


What must you know about an atom to determine its mass number?

The number of protons and neutrons in its' nucleus.


What is the number of neutrons in an atom affects the atomic what?

The number of neutrons in an atom can affect the atomic mass of an atom.


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.


An isotope is identified by its atomic mass number which is the total number of?

protons and neutrons in the nucleus of an atom. Isotopes of an element have the same number of protons but different numbers of neutrons. The number of neutrons in an atom affects its stability and often determines its nuclear properties.


What is the mass number of an atom of iodine with 76 nuetrons?

The mass number of an atom is determined by the number of neutrons and protons. Since you already know the number of neutrons, you just need the number of protons, then you can add them together. I happen to know that iodine has 53 protons, so that means that the mass number is 127.It is the protons and neutrons added together so when you add 53 and 74 you get 127! Hope that helped a lot!! :):):):):):):)


What is the sum of protons and neutrons in an atom?

Mass number!:)


What is the number of neutrons in an atom called?

The number of neutrons in an atom is called the neutron number.


What does the number of neutrons determine?

The number of neutrons in an atom determines the isotope of the element. Isotopes of an element have the same number of protons but differing numbers of neutrons. This affects the stability and nuclear properties of the atom.


What is the total amount of protons and neutrons in an atom?

The total amount of protons and neutrons in an atom is its mass number.


The sum of the protons and the neutrons indicates the .?

By the sum of protons and neutrons we obtain the mass number of the atom which is written at the top of the atom periodic number. We can also obtain the mass number by adding the atomic number and the number of neutrons because the atomic number and the number of protons are same. You know that scientists have discovered some particles which are smaller than protons and neutrons and these are known as quartz.


What is the mass number of 10 protons and 10 neutrons?

20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.