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By the number of protons and neurons in a element. each has a relative Atomic Mass of 1. an electron weighs around a 2000th of this, so is ignored for Ar calculations
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoThese determinations are based on mass spectrometry.
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How do scientists determine the number of neutrons and isotopes in an atom?
Atomic mass minus atomic number. This is rather simplified but the atomic mass of an element is the total of all the protons, neutrons, and electrons in an atom. Each proton and neutron has an atomic mass of approximately 1 AMU (atomic mass units) while an electron has an atomic mass of about 0.0005 AMU. So, you don't need to worry about the electrons. The atomic number of an element is simply the number of protons in the atom. So, atomic mass (number of protons and neutrons) minus atomic number (number of protons) equals number of neutrons in an atom.
What does one determine an atoms atomic mass?
If you mean "how does one determine an atoms atomic mass?", then the answer would be to find a periodic table of elements where the whole numbers indicate atomic number and the other indicating atomic mass. Atomic number is generally described as the number of protons in a naturally occurring atom of a given element, and the atomic mass is the number of protons + number of neutrons in an atom.
How you can use the atoms mass number and atomic number to determine the number of protons electrons and neutrons in the atom?
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
Is atomic mass and atomic diameter the same thing?
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
How many electrons are in the outer shell of an atom with the atomic mass of nineteen?
you cannot determine its electronic configuration through its atomic mass. atomic no is necessary. for this, check modern periodic table.
How do you determine the atom the atomic mass of an atom?
Proton + Nuetron = Atomic Mass
How do scientists determine the number of neutrons and isotopes in an atom?
Atomic mass minus atomic number. This is rather simplified but the atomic mass of an element is the total of all the protons, neutrons, and electrons in an atom. Each proton and neutron has an atomic mass of approximately 1 AMU (atomic mass units) while an electron has an atomic mass of about 0.0005 AMU. So, you don't need to worry about the electrons. The atomic number of an element is simply the number of protons in the atom. So, atomic mass (number of protons and neutrons) minus atomic number (number of protons) equals number of neutrons in an atom.
What does the number of neutrons determine?
they determine the atomic mass of the atom
How do you determine neutrons in an atom of sodium-20?
the atomic mass
How do you determine the numbers of the three types of particles in each atom?
In an atom, no. of protons = no. of electrons=atomic no. no. of neutrons=atomic mass-atomic no.
How you can determine the number of protons electrons and neutrons an atom has from an atom's mass number and its atomic number?
To determine the number of protons, look at the atomic number. The number of electrons is also the atomic number.To find the number of neutrons subtract the atomic number from the Atomic Mass number.
What are counted in an an atom to determine mass number?
Atomic Mass: protons AND neutrons atomic number: just protons
How do you determine the atomic mass number of any atom?
protons plus neutrons
What does one determine an atoms atomic mass?
If you mean "how does one determine an atoms atomic mass?", then the answer would be to find a periodic table of elements where the whole numbers indicate atomic number and the other indicating atomic mass. Atomic number is generally described as the number of protons in a naturally occurring atom of a given element, and the atomic mass is the number of protons + number of neutrons in an atom.
How do you determine the number of nuetrons in an atom?
Number of Neutrons = Mass number - Atomic Number
Is it true that the mass number can be used to determine the number of electrons in an atom?
no --- atomic number
How you can use the atoms mass number and atomic number to determine the number of protons electrons and neutrons in the atom?
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
