chemistry

• A pure element can take many forms. For example, diamond and graphite both are forms of pure carbon
• The human body contains enough carbon to provide 'lead'  for about 9,000 pencils.
• The only two non-silvery metals are gold and copper.
• The IUPAC name for water, H₂O, is dihydrogen monoxide.
• Although you may consider gold to be rare, there is enough gold in the Earth's crust to cover the land surface of the planet knee-deep.