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The Atomic Mass number is the mass of the nucleus in atomic mass units.

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Q: What number tells the mass of the nucleus of an atom?
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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.


What is the mass number and atomic number of an atom?

Atomic number tells how many protons are inside an atom's nucleus and therefore also how many electrons the atom has. An atom's mass number is the number of protons AND neutrons in the atom's nucleus and this will vary for each isotope of an element.


What tells an atoms mass?

This tells us that an atom of krypton has 36 protons in its nucleus. All you really need to find is something called the mass number.


What does an element's mass number tell us?

The mass number tells you the number of Protons and Neutrons in an atomic nucleus.


What does the atomic mass tell us?

it tells us that the number is equal to the number of protons plus the number of nuetrons in the nucleus of an atom


What does the atomic mass tell you?

It tells you the average amount of protons and neutrons within the nucleus of an atom. In other words, atomic mass - atomic number (protons)= the number of neutrons within the nucleus.


How is the mass number of a atom indicated?

The mass number is the sum of protons and neutrons in the nucleus of an atom.


Atomic mass and mass number?

Atomic mass is the number of protons present in the nucleus or number of electrons revolving around the nucleus in an atom .It is denoted by Z. Mass number is the sum of number of protons and neutrons present in a nucleus in an atom .It is denoted by A.


What is the atomic number on a table that tells us how many of what are in an atom of the element?

The atomic number of an elemnt tells you how many protons are in the nucleus and therefore how many electrons thare are in a neutral atom. The mass number is the toal of protons and neutrons.


How many protons are represented in an atom which has an atomic number of 9 and an atomis mass of 19?

An atom with an atomic number of 9 has 9 protons; that's what the atomic number is, it tells you the number of protons in the nucleus.


Does mass number of an atom actually represents the mass of an atom?

The mass number is sum of neutrons and protons in the atomic nucleus.


What relates the mass number?

The mass number is the number of protons and neutrons in the nucleus of an atom.