What element is Si? Si stands for Silicon. Fun science fact ... is present in a very small part of the atmosphere. The ...

The Periodic Table is a well-organized chart that contains all 118 known elements in the universe. These elements are the ...

VOICEOVER: Chemical symbols and formulas. Every element in the periodic table is represented by a unique chemical symbol, like O for Oxygen or Mg for Magnesium.Chemical formulas represent ...

It uses chemical symbols from the periodic table to represent the elements involved. Iron is Fe and oxygen is O. When it’s in the air, oxygen is two atoms joined together, so it’s represented ...