There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

The same chemical symbols are used all over the world, no matter which language is spoken, which makes them very useful. nitrogen N A ... in a chart called the periodic table.

The elements ... the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon, hydrogen, nitrogen ...