C1 Particles

C1 Particles

1. chemical substances

   • element
     • An element is a pure substance made from one type of atom
   • Compound
     • A compound is made of two or more different atoms chemically bonded together
   • Mixture
     • Different atoms existing together but NOT chemically joined together

2. Atoms

   • Protons
     • Found in the nucleus. Positively charged. Mass of +1
   • Neutrons
     • Found in the nucleus. Neutral/no charge. Mass of +1
   • Electrons
     • Found in orbital shells. Negatively charged. Mass of 0

3. Atomic structure

   • Atomic number
     • The atomic number or proton number tells you the number of protons of an atom. Remember the number of protons is equal to the number of electrons
   • Atomic mass
     • The mass of the protons and neutrons added together.