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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.
Kelton Conroy
Wiki User
∙ 11y agoMass number = number of protons + number of neutrons
Wiki User
∙ 9y agoThe sum of protons and neutrons indicates the mass number of a an element. The nucleus of the atom is where to protons and neutrons are found.
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∙ 13y agoAdd your answer:
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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.
What indicates the total number of protons and neutrons in an atom?
The mass number of an isotope indicates the total number (the sum) of protons and netrons in an atom.The number of protons is determined by the atomic number.The number of neutrons can be found by subtracting the atomic number from the mass number.
An atoms mass number equals the combination of what two things?
The mass number of an element is equal to the sum of the elements neutrons and protons.
What does the protons and neutrons tell you about the oxygen atom?
protons will tell the atomic number (8) the sum of protons and neutrons will give the mass number of the element
The mass number of an atom indicates the number of what?
The mass number is the sum of protons + neutrons.
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
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.
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
What is the mass number and what does it indicates?
The mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of the atom. It also indicates the total positive charge on the nucleus.
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.
What indicates the total number of protons and neutrons in an atom?
The mass number of an isotope indicates the total number (the sum) of protons and netrons in an atom.The number of protons is determined by the atomic number.The number of neutrons can be found by subtracting the atomic number from the mass number.
What is the sum of protons and neutrons?
The mass number
