How do you calculate the number of neutrons in an element?

Answer 1

There's only 1 per atom.

The number of electrons and protons are equal to the atomic number of the element, but each element regardless of its atomic number has only one neutron per atom.

Answer 2

if you have the atomic mass

then you can subtract the atomic number (representing the number of protons) and what you have left is the number of neutrons

for example, if the atomic weight of an oxygen atom is given as 16.0000, and knowing the atomic number is 8, then you know that there are 8 protons in that molecule

the atomic mass given on the periodic table is actually a statistical average of the occuring isotopes

so for oxygen, the published atomic weight is 15.9994

that means that although their may be some isotopes with more than 8 neutrons (maybe 9 or even 10), there are more of the isotopes with less than 8, bringing the average atomic weight down to barely below 16

the atomic weight is so close to 16 because most oxygen atoms have 8 protons and 8 electrons

for a particular oxygen atom with atomic weight of 15, you would know that there are 8 protons (oxygen always has 8 protons), and thus 7 neutrons

okay?

Answer 3

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Na, sodium, atomic number 23. The atomic number is the number of protons. In a neutral atom, it is also the number of electrons. When an atom becomes an ion by giving or taking electrons, then the number of electrons changes. The atomic mass is the sum of the neutrons and protons, so by subtracting the number from the mass you get the number of neutrons.[electrons essentially have no mass]

Answer 4

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How do you calculate the number of neutrons in an element?

Answer 5

How Do You Calculate Neutrons

Answer 6

You look at the atomic number which is also the number of protons in the element and then you look at the atomic mass, the atomic mass is the neutrons and protons, so you subtract the atomic number from the atomic mass, and that gives you the number of neutrons.

Answer 7

the number of neutrons is equal to the number of protons

Answer 8

Atomic weight - Atomic Number

Answer 9

the # of neutrons are the same as the # of electrons. It is also the same as the atomic #

Answer 10

by the atomic number, the atomic number is the number of protons nuetrons