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The formula is Atomic Mass (rounded to the nearest whole number) minus the Atomic Number.
This works because Protons and Neutrons have virtually the same mass, and electrons virtually none. As well as the Atomic Number being equal to the amount of Protons.
Essentially:
Protons + Neutrons - Protons = Neutrons. Basic Prealgebra.
So to find the amount of Neutrons in Erbium:
Erbium's Atomic Mass rounded (167) - Erbium's Atomic Number (68) = approx. 99 Neutrons
What else can I help you with?
Is erbium radioactive?
All erbium ordinarily found in nature is of stable isotopes. Like all other elements, erbium has synthetic radioactive isotopes.
How many electrons are in the outer shell of erbium?
Two.
Atoms of same chemical element that have different atomic mass are known as?
Isotopes. They differ in the number of neutrons in the nucleus.
What is the name for atoms of an element that have different masses?
An atom or element that have different masses are known as isotopes.
Why isotopes have only proton and different electron?
Isotopes have a different number of neutrons.
Is erbium radioactive?
All erbium ordinarily found in nature is of stable isotopes. Like all other elements, erbium has synthetic radioactive isotopes.
How many electrons does erbium have?
Erbium has 68 electrons.
What radioactive isotope has 68 protons and 31 neutrons?
Element #68 is Erbium. The number of the isotope, of course, is the sum of the protons + neutrons. Checking the Wikipedia article "Isotopes of erbium", it looks as if this isotope doesn't actually exists.
How many neutrons does Ar element have?
That depends on the isotope, as Argon has three different stable isotopes and many different radioactive isotopes.
How many electrons are in the outer shell of erbium?
Two.
What is hydrogen plus erbium?
hydrogen plus erbium
Atoms of same chemical element that have different atomic mass are known as?
Isotopes. They differ in the number of neutrons in the nucleus.
What is the name for atoms of an element that have different masses?
An atom or element that have different masses are known as isotopes.
Which elements have different isotopes?
Many elements have different isotopes: 1) Carbon - Carbon 12, Carbon 14 2) Hydrogen - Protium, Deuterium, Tritium 3) Chlorine - Chlorine 35, Chlorine 37 etc
What are the Names of 15 different isotopes and their application?
what are the names of 15 different isotopes
Why isotopes have only proton and different electron?
Isotopes have a different number of neutrons.
What are facts about isotopes?
Isotopes have a different number of neutrons.
