Wednesday, January 8, 2014

ATOMS and MOLECULES

WHAT ARE ATOMS?



  • ATOM is the smallest part of the matter. 
  • Atoms are made up of: PROTONS, NEUTRONS and ELECTRONS.
  • Protons and neutrons are in the NUCLEUS and electrons are around the nucleus distributed in SHELLS.
  • Atoms always have the same number of protons and electrons.
  • MOLECULE is made up of atoms.

MAKING MOLECULES WITH ATOMS




  • ELEMENTS in the same group have similar chemical and physical properties.
  • VALENCE NUMBER is the number of electrons in an atom's outer shell.



MOLECULES IN MOTION




  • TEMPERATURE is the measure of molecular movement.

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