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The mass number is the sum of protons + neutrons.

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11y ago
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12y ago

The mass number of an element is the total number of protons plus neutrons

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11y ago

The number of atoms it has. NO, the Mass number refers to it's atomic weight. It is the sum of protons, and neutrons in the atom.

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14y ago

Tells you the toal number of Protons AND Neutrons of an 'element' (better: 'isotope of an element')

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6y ago

Protons and Neutrons comprising the atom's nucleus.

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15y ago

protons and neutrons

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Q: The mass number of an atom indicates the number of what?
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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.


The mass number for an atom of an element when stated with the element's symbol indicates that you have an?

You think probable to an isotope.


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.


An atom has an atomic number of 56 yet has a mass number of 137 amu evalution of data indicates that the element is?

barium


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.


The number of protons in the nucleus indicates the atom's?

It indicates the atomic number of that element.


What is the mass number of a atom?

the mass number is number of protons in an atom, plus the number of neutrons.


What do you get when you change the mass number of an atom?

You can't change the mass number of an atom because the mass number is the number of protons which is the atom's atomic number I hope this helped :)


What is the number of neutrons in an atom affects the atomic what?

The number of neutrons in an atom can affect the atomic mass of an atom.


Is atomic number the same as mass number?

Atomic number is the number of protons in the atom; atom mass is the total mass of the atom (usually neglecting the mass of the electrons because they have so little).


What does the mass number of an atom tell you about the atom?

The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.


In an atom protons are always?

Protons are always in the nucleus of an atom. The number of protons indicates the element, its position in the periodic table. Protons a deemed to have a charge of (+) Protons are deemed to have a relative mass of '1' . The total number of protons and neutrons in the nucleus of an atom is the Atomic Mass. Collectively they are named as 'Nucleons'.