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Atoms & Molecules - Elements can combine to form compounds

  • structural formula

  • shows arrangement of atoms

  • example

  • structural formula for water is H-O-H

Atoms & Molecules - Atoms consist of protons, neutrons and electrons

  • Each element consists of one kind of atom

  • “atom” from Greek word meaning “indivisible”

  • atom is smallest unit of matter

Atoms & Molecules - Atoms consist of protons, neutrons and electrons

  • atoms

    • composed of many types of subatomic particles

    • nucleus contains

      • protons

      • neutrons

    • electrons orbit nucleus

    • others particles

      • discussed primarily by physicists

Web/CD Activity 2B: Structure of the Atomic Nucleus

Atoms & Molecules - Atoms consist of protons, neutrons and electrons

  • protons (p)

    • type of charge =

    • where found =

    • relative mass =

Atoms & Molecules - Atoms consist of protons, neutrons and electrons

  • neutrons (n)

    • type of charge =

    • where found =

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