The Water Course

0 of 45 lessons complete (0%)

TWC Prologue

TWC 0.04 – Recap



  • Atoms can join together as molecules by forming covalent bonds.
  • Covalent bonds are formed when atoms share an electron.
  • Another way for atoms to bond is through ionic bonding.
  • Ionic bonding occurs when one atom steals an electron from another atom.
  • Electrons have a negative charge, so when one is stolen, the thieving atom acquires a negative charge and is called an anion.
  • The atom that is stolen from acquires a positive charge and is called a cation.
  • Rainfall encounters carbon dioxide and dissolves it, which makes the water acidic.