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The Atomic Mass unit is defined to be 1/12 of the mass of a carbon-12 atom. Atomic masses can determined by weighing molar amount of an isotope.

Absolute masses (in kg) are determined by measuring the amount that charged atoms are deflected by magnets, since if you know the charge you can calculate mass from the amount of deflection.

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Related Questions

Which of the following particles is used to determine the mass of an atom?

Mass of an atom is determined by the no. of protons+ no. of neutrons in the atom.


What two subatomic particles are added together to determine the mass number?

The two subatomic particles added together to determine the mass number of an atom are protons and neutrons. Protons have a positive charge, while neutrons have no charge, but both contribute to the mass of an atom.


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.


What are necleons?

Nucleons are subatomic particles found in the nucleus of an atom. They include protons and neutrons. Protons are positively charged particles, while neutrons have no charge. Together, they determine the mass and stability of an atom.


How do you determine the atom the atomic mass of an atom?

Proton + Nuetron = Atomic Mass


What particles are used to determined the mass of an atom?

Mass of an atom = mass of protons + mass of neutrons


The mass of all particles of an atom added together is its what?

The sum of protons and neutrons in an atom is called mass number.


Which particles in a atom have a mass of 1?

protons and nuetrons


How many elements are in a atom?

i don't know about 2


How do you determine an atom's mass number?

mass number= no. of protons + no. of neutron


What are the subatomic particles that determine an atom's chemical behavior?

electrons


What subatomic particle or particles contributes the most to the mass of the atom?

These particles are protons and neutrons.