1. 08/09/2015 Starter - Elements and symbols that you should know: Part 1 – The obvious ones: 1)Hydrogen 2)Helium 3)Lithium 4)Beryllium 5)Boron 6)Carbon 7)Nitrogen 8)Oxygen 9)Fluorine 10)Neon 11)Magnesium 12)Aluminium 13)Silicon 14)Phosphorus H He Li Be B C N O F Ne Mg Al Si P

2. 08/09/2015 Some more obvious ones: 15)Sulphur 16)Chlorine 17)Argon 18) Calcium 19) Zinc The less obvious ones: 1)Sodium 2)Potassium 3)Iron 4)Copper 5)Silver 6) Tin 7) Gold 8) Mercury 9) Lead S Cl Ar Ca Zn Na K Fe Cu Ag Sn Au Hg Pb

3. 1. Atoms Elements Compounds 2. The structure of an Atom 3. Symbols for elements 4 Elements of the periodic table Chemistry Elements Chemistry Elements 5 Making Compounds 6 Chemical reactions 6 Chemical reactions

4. Objective: What is everything made of? Outcomes: LO1 – know how electrons are arranged around the atom(Level 4) LO2 – work out the number of neutrons using atomic and mass numbers of an atom (Level 5) LO3 – explain what an isotope is (Level 6/7)

5. Starter - Atomic structure Atomic Structure

6. Starter - Atomic structure Atomic Structure

7. Each electron in an atom is at a particular energy level (or shell) Electrons fill the lowest energy levels first (nearest to the nucleus) The first shell can take a maximum of 2 electrons, the second shell can take 8, and the third shell can take 8 LO1- Electrons Electrons

8. LO1- Electron Shells Electron shells

9. 1.The atomic number is the number of protons in the nucleus 2.In an atom, the number of electrons always equals the number of protons 3.Atoms do not have an overall electrical charge LO2 - Atomic number Atomic Number

10. LO2 - Atomic number Atomic Number

11. LO2 - Mass number Mass Number

12. 1.The mass number is the total number of protons and neutrons in an atom 2.The number of neutrons can be calculated by subtracting the atomic number from the mass number Mass number Mass Number

13. Mass number Mass Number

14. Calculations Calculations

15. 1.Isotopes are atoms of the same element that have different numbers of neutrons (e.g. carbon-12 and carbon-14) 2.Isotopes have the same atomic number but different mass numbers LO3 - Isotopes Isotopes

16. Isotopes

17. What have we learnt today? I can: LO1 – know how electrons are arranged around the atom(Level 4) LO2 – work out the number of neutrons using atomic and mass numbers of an atom (Level 5) LO3 – explain what an isotope is (Level 6/7)

18. Plenary Each one test one Ask you neighbour a question about what you have learnt today.

19. Homework