Explain why isotopes have identical chemical properties.

Isotopes have identical chemical properties because they have the same electronic configuration.

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What type of property differs between isotopes - physical or chemical properties?

Physical properties

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What does the notation Ar stand for?

Ar stands for relative atomic mass.

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Define the term relative atomic mass.

Relative atomic mass is the weighed mean mass of an atom of an element relative to 112\frac{1}{12}th of the mass of an atom of carbon-12.


Relative atomic mass has no units because it is a ratio of two masses.

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What is the difference between relative isotopic mass and relative atomic mass?

Relative isotopic mass is the mass of a single isotope, relative atomic mass is a weighed mean mass of several isotopes.

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What is an element?

An element is a substance made up of only one type of atom, where all the atoms of a substance have the same number of protons.

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What is an isotope?


Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons.

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What is the formula for relative atomic mass (Ar)?

Ar​= sum of abundance of all isotopes sum of (isotopic mass × isotopic abundance) ​

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What does relative atomic mass mean?

Relative atomic mass is the average mass of all the isotopes of an element, weighted according to their natural abundances.

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Define the term relative isotopic mass.

Relative isotopic mass is the mass of an isotope relative to 112\frac{1}{12}th of the mass of an atom of carbon-12.


Relative isotopic mass has no units because it is a ratio of two masses.

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