Chemistry

• Matter


  Anything that can be described by its properties
• Properties of matter


  • Physical
  • Chemical
• The periodic table is divided into periods and groups
• Elements in the same group have similar chemical properties
• Atoms are made up of protons, neutrons and electrons
• Atoms can undergo physical and chemical changes
• Physical change


  Appearance of matter changes but substance particles remain the same
• Chemical change


  Substance particles change to form new substances
• States of matter


  • Solid
  • Liquid
  • Gas
• As temperature increases


  Particles move faster
• Atoms have a central nucleus with electrons orbiting it
• Atoms can be arranged in the periodic table based on their properties
• Atoms in the same group have the same number of valence electrons
• Atomic size decreases moving left to right across a period
• Atomic size increases moving down a group