Similarities and dissimilarities of isotopes || Explain relative abundance of isotopes

Similarities of isotopes.

• Isotopes Have the same number of protons.
• Isotopes have the same number of electrons.
• In periodic table isotopes have the same position.
• Isotopes have the same chemical properties. 

Dissimilarities of isotopes.

• Isotopes have different numbers of neutrons.
• Isotopes have different atomic masses.
• Isotopes have different physical properties.

Relative abundance of isotope.

The percentage of natural occurrence of isotope of an element is called relative abundance of isotope.

Important points of relative abundance of isotope.

Every isotope has its own relative abundance.

Masses and relative abundance of isotopes can be determined by mass spectrometry.

Properties of the element are like that of the most abundant isotope.

Mono-isotopic element.

Such elements having only one isotope are called mono-isotopic elements.

For example, gold and arsenic.

Detailed isotope.

• 280 Isotopes naturally occurred.
• Out of 280 Isotopes only 40 Isotopes are radioactive.
• 300 Isotopes are artificial and unstable.
• Isotopes having odd atomic numbers have only 2 stable isotopes.
• Isotopes having even atomic numbers have more than 2 stable isotopes.
• Isotopes having atomic mass of 4 or multiple of 4 have stable isotopes.
• Out of 280 isotopes, 154 isotopes have even atomic number and even atomic mass.