Eighty out of the first 82 elements in the periodic table have stable isotopes. Measuring and analysing their distribution allows for many practical applications. The IAEA assists Member States in ...

The table is divided into rows called periods and columns called groups or families. Mendeleev’s work Here is a list of periodic table elements with their names, symbols, atomic numbers ...

We’ll be looking at what makes isotopes of an element ... SUNAYANA: The periodic table developed when the early chemists attempted to list the known elements into some kind of order.