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What is the sum of a number of protons plus the number of neutrons?
Wiki User
∙ 9y ago
Since the mass of one proton or one neutron is almost exactly equal to 1 gram per mole, and the mass of an electron is negligible, the atomic mass of 1 mole atoms can be found by adding the number of protons and neutrons it contains.
Wiki User
∙ 12y ago
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The atomic mass is equal to the sum of?
The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.The relative atomic mass is the average atomic mass number of all the known isotopes of an element.
An atoms what number is the sum of protons and neutrons?
The sum of protons and neutrons in an atom is called mass number.
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.
The sum of the protons and the neutrons indicates the .?
By the sum of protons and neutrons we obtain the mass number of the atom which is written at the top of the atom periodic number. We can also obtain the mass number by adding the atomic number and the number of neutrons because the atomic number and the number of protons are same. You know that scientists have discovered some particles which are smaller than protons and neutrons and these are known as quartz.
How is atomic number differ from mass number?
atomic mass is the number of protons in an atom mass number is the number of protons plus neutrons in an atom
The mass number of an atom indicates the number of what?
The mass number is the sum of protons + neutrons.
The atomic mass is equal to the sum of?
The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.The relative atomic mass is the average atomic mass number of all the known isotopes of an element.
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 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.
The sum of the number of protons in the number of neutrons in and Atom is the what?
The number of protons plus the neutron number is called the atomic mass or "mass number".
What is the sum of protons neutrons in an atom?
Mass number = Protons+Neutrons
What areParticles that makes protons and neutrons?
The sum of the number of protons and neutrons in an atom
What is the sum of protons and neutrons in an atom?
Mass number!:)
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.
Sum of protons and neutons?
the mass number
What is the sum of the protons and nuetrons in an atomic number?
atomic number is the number of protons. the sum of protons and neutrons is known as 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.
