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What makes up nearly all of the atom's mass?
The sum of all Protons and Neutrons.
What is the sum of protons neutrons in an atom?
Mass number = Protons+Neutrons
An atoms what number is the sum of protons and neutrons?
The sum of protons and neutrons in an atom is called mass number.
What Make up nearly all of an atoms mass?
The sum of all protons and neutrons - Apex Learning
In periodic table of elements it is the sum of the number of protons and neutrons of an atom.?
The sum of protons and neutrons is the atomic mass.
What areParticles that makes protons and neutrons?
The sum of the number of protons and neutrons in an atom
Is the is the sum of the numbers of protons and neutrons in an isotope of the element?
Isotopes involve different atomic masses. It is sum of number of protons and neutrons.
The mass number of an atom of calcium with 20 protons and 20 neutrons is?
The mass number of an atom is the sum of the protons and neutrons in its nucleus. Therefore, for an atom of calcium with 20 protons and 20 neutrons, the mass number would be 40.
The mass number is used to calculate the number of?
protons and neutrons in an atom. It is the sum of protons and neutrons in the nucleus of an atom.
What is the sum of protons and neutrons known as an element?
Sum of protons and neutrons is the Mass number of the element. The number of protons is equal to the number of electrons. Neutrons and protons are sub atomic particles.
What is the sum of protons and neutrons in an atom?
Mass number!:)
Do electrons equal the sum of the number of neutrons and protons in an isotope?
No. The number of neutrons has no affect on the number of protons and electrons.
