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The Atomic Mass NUMBER equals the number of protons and neutrons in an atom.

DO NOT confuse this with the mass of an atom.

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13y ago
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12y ago

The atom's mass number is the amount of protons and neutrons in the atom's nucleus.

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A(mass #) = Z(Atomic #) + N(# of neutrons)

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15y ago

Mass number = number of protons + number of neutrons.

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Atomic number = number of protons = number of electrons = number in the Periodic Table Atomic mass is the mass of an isotope or an element.

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Atomic number = Number of protons = Number of electrons

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protons and electrons it has

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Grams per mol of an element

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Q: Atomic mass equals the number of what?
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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.


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

The number of neutrons in an atom can be calculated by subtracting the atomic number (number of protons) from the mass number. For hydrogen, the atomic number is 1 and the mass number is also 1. Therefore, the number of neutrons in hydrogen is 1 (mass number - atomic number = 1 - 1 = 0 neutrons).


What does the atomic mass equals the number of?

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


The sum of the protons and neutrons in an atom equals the .?

atomic number


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.


Isotope symbol for Z equals 28 A equals 64?

The isotope symbol for the element with atomic number Z=28 and mass number A=64 is ^64Ni.


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)


The combined number of protons and neutrons?

The combined number of protons and neutrons is known as the mass number of an atom. It can be used to calculate the atomic mass by adding the total number of protons and neutrons in the nucleus of an atom.


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)


Calcium atomic nummber is 20 what period is caluim?

We can find calcium as a non metal element. Atomic number of it is 20.