State whether the following statement is true or false:
Each isotope of an element is an impure substance.
Each isotope of an element is an impure substance.
(FALSE) False.
An isotope of an element consists of atoms that have the same number of protons but a different number of neutrons. Since all atoms in a sample of a pure isotope have the same atomic number and the same chemical properties,it is considered a pure substance. Isotopes are different forms of the same element,not impurities.
An isotope of an element consists of atoms that have the same number of protons but a different number of neutrons. Since all atoms in a sample of a pure isotope have the same atomic number and the same chemical properties,it is considered a pure substance. Isotopes are different forms of the same element,not impurities.
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Two elements are denoted as follows:
$_{20}^{40}A$ and $_{18}^{40}B$
$(a)$ Find the number of electrons present in $A$ and $B$.
$(b)$ Find the number of nucleons present in $A$ and $B$.
$(c)$ Explain the special 'term' used to represent $A$ and $B$ and define the same.
$_{20}^{40}A$ and $_{18}^{40}B$
$(a)$ Find the number of electrons present in $A$ and $B$.
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$(c)$ Explain the special 'term' used to represent $A$ and $B$ and define the same.
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