Elements & Compounds

• How many naturally occurring elements are there?

  92
• What defines an element?

  A substance made of one type of atom
• What is gold made of?

  Gold atoms
• How do elements combine to form compounds?

  Through chemical reactions
• What are the two types of compounds?

  • Covalent compounds
  • Ionic compounds
• What is an ion?

  An atom or molecule that gains or loses one or more electrons
• What charge do metal ions typically have?

  Positive
• What charge do non-metal ions typically have?

  Negative
• How do you balance a chemical equation?

  By ensuring equal atom numbers on both sides