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The sum of the number of protons and neutrons in the atomic nucleus is called the atomic mass number.
*Related Information:
One element may exist as a mixture of atoms with different numbers of neutrons. This is in contrast with, and often confused with, the atomic mass (as such, without number). This is the average mass of all naturally occurringatoms of a particular element.
Example:
Naturally occurring chlorine, atomic number 17, has 17 protons but can have either 18 (75%) or 20 (25%) neutrons in its nucleus as well. The Atomic Mass numbers of these two isotopes are 35 or 37 respectively. The atomic mass of the element chlorine is 35.45 a.m.u.
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What is an element made up of?
An element is made from atoms. Atoms contain protons, neutrons and electrons. Protons and neutrons contain quarks and gluons.
The mass number of an atom indicates the number of what?
The mass number is the sum of protons + neutrons.
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 location of neutrons in the atoms?
Neutrons are located with Protons in the Nucleus.
What is the sum of protons and neutrons in an atom?
Mass number!:)
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
Atoms have a mass number equal to the sum of?
the protons and neutrons.
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 is an element made up of?
An element is made from atoms. Atoms contain protons, neutrons and electrons. Protons and neutrons contain quarks and gluons.
How can an atoms mass number be determined?
it is the sum of the protons and neutrons present in the nucleus of the atom.
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 statement is true about atoms protons neutrons and electrons?
Several come to mind. They are both found in the nucleus of an atom. Protons have a positive charge, while neutrons have no charge. They are nearly the same size, though neutrons are a bit larger. The sum of the protons and neutrons in an isotope of an element is its mass number.
What makes up nearly all of the atoms's mass?
The sum of all Protons and Neutrons.
What determines an atoms atomic mass?
It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What makes an atoms mass number?
An atom's mass number is the sum of the numbers of protons and of neutrons in the atom.
