Chemistry

Chemistry

1. What is the relative charge and mass of protons neutrons and electrons?

   • Proton: mass, 1 Charge +1 Neutron: mass, 1 Charge 0 Electron mass, very small Charge -1

2. What is the atomic number?

   • The number of protons in an atom

3. What is the mass number?

   • The number of protons and neutrons

4. What is the charge of an atom?

   • Atoms don't have a charge

5. What are elements made up of?

   • Elements are made up of atoms with the same atomic number

6. What are isotopes?

   • Isotopes are atoms with the same number of protons but a different number of neutrons

7. What is a compound?

   • When 2 or more elements react they form a compound.

8. What is distillation used for?

   • Distillation is used to separate liquid from a solution, for example ink in water

9. Give an example of a chemical equation

   • methane + oxygen --> carbon dioxide + water

10. Symbol equations

    • Symbol equations must always be balanced and