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As an example, take Americium 241 - 241 is the atomic weight. It is Atomic number 95 in the Periodic Table and so there are 95 protons. There are thus 241 -95 = 146 neutrons. That principle applies to all the elements.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoYou take the Atomic Mass of the element and subtract the atomic number from it. For example, take Carbon (C). It has an atomic mass of 12 and the atomic number is 6. Therefore the number of neutrons is 6. There can be isotopes which have a different number of neutrons the a stable atom has. When you calculate the number of neutrons for one of Carbon's isotopes, Carbon13, you get 7 neutrons instead of 6.
Wiki User
∙ 11y agoSubtract the number of protons from the mass number.
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How is the number of neutrons in an atom found?
The number of neutrons can be calculated if the atomic number and mass number of an element is known. The number of neutrons = Mass number - atomic number.
An atom has 13 protons and an atomic mass of 27 How many neutrons does this atom have?
The atom in question has 13 protons, so is atomic number 13, which is Aluminium. Assuming that all of the atom's mass is formed from the protons and neutrons, and each of these have atomic mass 1, the number of neutrons is 27 - 13 = 14 neutrons. Almost all Aluminium is of this isotope.
In a magnesium atom where are the protons and neutrons?
In an atom protons and neutrons are located in the atomic nucleus.
What is an assembly of protons and neutrons within an atom called?
An assembly of protons and neutrons within an atom constitutes the atom's NUCLEUS.
What accounts for most of the size of an atom?
It depends it can be protons of neutrons depending on which atom but for many it is neutrons
Neutrons in the nucleus of an atom calculated?
Mass number minus atomic number = number of neutrons
What is equal to the total number of protons and neutrons?
If you add the number of protons to the number of neutrons in an atom, you have calculated that atom's atomic mass.
How is the number of of neutrons in the nucleus of an atom calculated?
Subtract the number of protons from the mass number.
What mass number is calculated by adding the numbers?
the mass number of an atom is the number of protons in an atom, plus the number of neutrons.
How is the of nuetrons in the nucleus of an atom calculated?
If you are asking how the number of neutrons in the nucleus of an atom is calculated, here is how: You need to find the mass number of the atom. Take the mass number and subtract the atomic number (number of protons) from it. what number you have left is the number of neutrons in the nucleus. For example: Neon has a mass number of 20 and an atomic number of 10. 20 - 10 = 10.. so the amount of neutrons in the nucleus of Neon would be 10.
Where are protons and neutrons in an atom?
protons and neutrons are located in the atom's nucleus.
What do neutrons add to an atom?
Neutrons add MASS to an atom.
How is the number of neutrons in an atom found?
The number of neutrons can be calculated if the atomic number and mass number of an element is known. The number of neutrons = Mass number - atomic number.
When the central region of an atom where its neutrons and protons are?
The protons and neutrons of an atom are found in the nucleus of the atom.
Where in the atom are neutrons?
Neutrons can be found in the centre of the atom (the nucleus), along with protons.
How many neutrons are in an atom I?
A typical atom of iodine contains 74 neutrons.
An atom has 13 protons and an atomic mass of 27 How many neutrons does this atom have?
The atom in question has 13 protons, so is atomic number 13, which is Aluminium. Assuming that all of the atom's mass is formed from the protons and neutrons, and each of these have atomic mass 1, the number of neutrons is 27 - 13 = 14 neutrons. Almost all Aluminium is of this isotope.
