118 Elements and Their Symbols and Atomic Numbers: The periodic table ... which increase sequentially from 1 (Hydrogen) to 118 (Oganesson). Each element has unique chemical properties and is ...

Hydrogen is the lightest and most abundant ... gas that is present in a very small part of the atmosphere. The chemical ...

VOICEOVER: Chemical symbols and formulas ... has four carbon atoms and ten hydrogen atoms. And the formula of sulfuric acid is H₂SO4. And this tells us that one molecule of sulfuric acid ...

The same chemical symbols are used all over the world ... For example, water is a compound of hydrogen and oxygen, chemically joined together. Each of its molecules contains two hydrogen atoms ...