chemistry

chemistry

1. protons

   • relative mass 1
   • charge +1
   • found in the nucleus

2. neutrons

   • relative mass 1
   • charge 0
   • found in the nucleus

3. electrons

   • relative mass1/1840
   • charge -1
   • found in the shall of an atom

4. ion

   • a charged atom

5. mass number- the number of protons & neutrons in an atom

6. atomic number - protons in the nucleus

7. isotope - atoms of the same element with the same number of protons but different number of neutrons

8. flame tests

   • calcium- red
   • potassium - purple/lilac
   • sodium - yellow
   • copper - blue/green