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 ...

TULELA: Thanks, NNICK. SUNAYANA: So let’s just summarise Mendeleev’s table. He arranged elements in order of increasing atomic weight. The horizontal rows are called periods. The vertical ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...