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An isotope's mass number is the sum of the protons and neutrons in each atomic nucleus of the isotope.

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Q: What does the atomic mass equals the number of?
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Mass number - atomic number equals?

Mass number minus the atomic number equals the number of neutrons. Mass number is the number of particles in an atom that have significant mass. Electrons are assigned a value of 0 since the mass is so much smaller than protons and neutrons. Protons and neutrons are similar in mass and are assigned mass number of 1. The formula for calculating atomic mass atomic mass = # protons + # neutrons.


Atomic mass equals the number of what?

The atomic mass NUMBER equals the number of protons and neutrons in an atom. DO NOT confuse this with the mass of an atom.


What is hydrogen's number of neutrons equals mass number - atomic number equals?

A hydrogen atom has one proton, one electron and '''zero''' neutrons. Rephrased, the question is: Hydrogen's number of neutrons equals mass number - atomic number.


The combined number of protons and neutrons?

Number protons + number neutrons is called the mass number or the atomic mass.


What is the atomic number of an atom with mass number 9 and 5 electrons?

The atomic number is the number of Protons The mass number is the number of Protons and Neutrons The number of Electrons always equals the number of Protons Therefore according to the above information the atomic number of the atom is 5 HOWEVER there is NO element with a mass number (atomic mass) of 9 with an atomic number of 5. You question is impossible to answer. Beryllium has an Atomic mass of 9.0122 and an Atomic number of 4 Boron has an Atomic mass of 10.811 and an Atomic number of 5


What is the atomic mass of a atom that has 6 neutron 6 protons and 6 electron?

Number of protons = atomic number = 6 atomic units Number of protons + neutrons = mass number = 13 atomic units


When you subtract the atomic number from the atomic mass it will give you the number of what?

the protrons, neutrons and electrons in a atom


What equals atomic mass minus protons?

Roughly, the number of neutrons. Note that the atomic mass is only approximately equal to the number of protons plus the number of neutrons - there is a relatively small discrepancy, due to the binding energy.


Which of the following equals one atomic mass number?

Atomic number: number of protons or electrons in a neutral atomMass number: sum of protons and neutrons in the atomic nucleusAtomic mass number is not a very correct expression.


How do the mass number and the atomic number of an element different?

Atomic number equals the number of protons, the (atomic) mass number equals the sum of (the number of) protons and neutrons of the same element.The answer is: they're differing in the number of neutrons(Mathematically: Where A = p and M = p + n, the difference in A and M is n)


What is a example of a non atomic number?

Mass number is the sum of neutrons and protons. It is equals to total of their weights. As an example hidrogen-2 (deuterium) has a mass number of 2.


How do the mass numbers and the atomic numbers of an element differ?

Atomic number equals the number of protons, the (atomic) mass number equals the sum of (the number of) protons and neutrons of the same element.The answer is: they're differing in the number of neutrons(Mathematically: Where A = p and M = p + n, the difference in A and M is n)