Isotopes are those species of chemical elements that have the same atomic numbers but different mass numbers. This means that the isotopes of an element contain a same number of protons and electrons but the number of neutrons in them is varied.
The isotopes also tend to occupy the same position in the periodic table as the elements in the periodic table are being organized according to the atomic numbers, not the mass numbers. The concept of isotopes was first given by Soddy. The total number of stable isotopes is 254, others are unstable and radioactive.
Examples of Isotopes:
Carbon has three isotopes and they are named C-12, C-13, and C-14. Out of these, carbon-12 is the most abundant one. C-14 is radioactive and is used as a tracer.
List the stable isotopes for all Period 3 elements (Na through
Of the following isotopes, which are isotopes of the same element
List the half-life of the longest-lived isotope for
Write the atomic symbol / for each of the isotopes described below
The following isotopes (listed with their half-lives) have
Although naturally occurring potassium consists mostly of the isotope of mass number
Read the “Chemistry in Focus” segment “Whair” Do
The element krypton has several radioactive isotopes. Below are listed several
Though the common isotope of aluminum has a mass number of 27
Read the “Chemistry in Focus” segment Isotope Tales. Define
