1. C2 The Periodic Table

2. Connect to the Lesson
On your black and white periodic table, colour the Alkali Metals, Transition metals, Halogens and Nobel gases, each a different colour, just like the bottom right diagram
The blank periodic table is included in the resource pack.

3. The Periodic Table Wednesday, September 19, 2018 Learning Objective
Key Words
Describe what the periodic table is
Know how to use the table to calculate subatomic particle numbers
Atomic number, Relative atomic mass, valance electrons, unreactive

4. Outcomes for this lesson
Recall how we draw the electronic structure of elements and know some key terms relating to the periodic table
Use the periodic table to calculate the number of subatomic particles in elements
Explain how the position of an element in the periodic table is related to the arrangement of electrons in its atoms and hence to its atomic number

5. Progress: Start of Lesson
Stick a post it note on where your understanding of this lesson topic is
the numbers are the grades (eg Grade 6, Grade 7, Grade 3)
By end of the lesson try to get into the green zone!!
What do you know already?

6. So what is the periodic table?
KEY DEFINITION – write down
The periodic table is the table arrangement of the elements, they are ordered by their atomic number (number of protons or electrons) and chemical property similarities.
There are around 100 elements (precisely 118)

7. Arrangement

8. Groups
There are 8 groups 1 5 6 7 4 8 3 2

9. Groups
Every element on the periodic table is grouped together with elements with similar chemical properties.
Think Pair Share:
What’re names of Group 1, 7 and 0?
Group 1 Alkali metals
Group 7 Halogens
Group 0 Noble Gases

10. Groups
The vertical groups show that the elements in that specific group …
REACT SIMILARLY
HAVE SIMILAR CHEMICAL PROPERTIES
HAVE SIMILAR STRUCTURE

11. ^^^ Very important, will be covered again in a later lesson
Groups: Alkali Metals
They react rapidly (very fast) with water, producing an alkaline solution and hydrogen gas. The metals become more reactive as you go down the group.
TASK: Can you interpret the first sentence into a word equation, and imagine the metal was lithium?
Lithium + water > lithium hydroxide + hydrogen
^^^ Very important, will be covered again in a later lesson

12. Challenge Yourself!
CHALLENGE: Logically, think about what the symbolic equation for this reaction is?
2Li + 2H2O > 2LIOH + H2 Why are there “big” numbers in front of the formulae?

13. Groups: Halogens
The halogens exist as diatomic molecules – that means they have two atoms in each molecule. As you go down the group, the halogens become less reactive.
Task; Name a halogen using your periodic table. Have you heard of any of the halogens before? Where?

14. Groups: Nobel Gases
Nobel gases are very unreactive and exist as individual atoms (monatomic).
Grade 6 Question: - Talk in pairs
-WHY are the Nobel gases unreactive??
Because they have a full outer shell of electrons
Use your periodic tables: what element is missing off the right?

15. Groups: Transition Metals
They’re found between groups 2 and 3
They are generally quite dense (heavy) and many form brightly coloured compounds.
They are also good conductors of heat and electricity
They have high melting points

16. Groups Think Pair Share What else can these groups tell us??
The number of VALANCE ELECTRONS (electrons on the most outer shell) an element has.
eg Oxygen is in group 6, so we know Oxygen has 6 valance electrons
We can REVERSE this process, so if we know Oxygen has 6 electrons on outer shell, its in group 6.

17. Periods
There are 7 periods 1 2 3 4 5 6 7

18. Periods
All of the elements in a period have the same number of atomic orbitals.
Eg every element in the top row (the first period) has one orbital for its electrons.
All of the elements in the second row (the second period) have two orbitals for their electrons.

19. Boost your Grade
If you’re aiming for the higher grades (5-9) use key terms more often!
Eg monatomic, unreactive, valance electrons

20. Recap Electron Structure
Shell/ orbital/ energy level
electrons
What element is this? Use your periodic tables for help.
nucleus

21. Recap fact Electron Structure
When drawing (or writing) electronic configuration you are only allowed 2 electrons on the first shell, 8 on the second and 8 on the third. Any leftover are on the 4th.
We now know….. if we know the element’s period it’s in, we know how many shells it needs!

22. Recap Electron Structure Writing the electronic structure
Take fluorine (a halogen, so 7 valance electrons) as an example
It has 2 electrons on its first shell, then 7 on its second.
Therefore it has the configuration 2.7

23. Outcomes for this lesson
For grade 4-5, Recall how we draw the electronic structure of elements and know some key terms relating to the periodic table
For grade 6-7, Use the periodic table to calculate the number of subatomic particles in elements
For grade 7, Explain how the position of an element in the periodic table is related to the arrangement of electrons in its atoms and hence to its atomic number

24. Key Terms - fill in blanks in books
The rows (horizontal) are called the P______
The columns (vertical) are called the G________
Elements that are in the same G_____ r______ similarly
Elements are ordered by their increasing a_______ n______
Elements’ V_______ E_______ give them their c______ p_______

25. The Periodic Table Think Pair Share- what does the zig zag line do?
It separates the metals from the non-metals

26. Progress: Middle of Lesson
Stick a post it note on where your understanding of this lesson is NOW (THE MIDDLE OF THE LESSON)
Are you in the green zone yet?
If not how will you get there?
How confident am I?

27. Bingo!
Back of books, make a 2x3 grid & write down 6 elements from the first 20 elements on the periodic table
Eg: Mg Ca Li He Ar F
Write these down as a SYMBOL
I’ll be saying elements as their names, electronic configs. Or the group/period they’re in!

28. Label your Handout Name of element Atomic number Chemical symbol
Relative atomic mass
(RAM)

29. Calculating Subatomic Particles
The atomic number tells us the number of P__________ or E________ in the element.
The atomic mass is the number of P______ and N_______ in the element.
We can use this for example….

30. Calculating Subatomic Particles
Take a Sodium atom We know its atomic number is 11
This means Sodium has 11 PROTONS and 11 ELECTRONS
To work out the number of neutrons, we:
Take the ROUNDED ATOMIC MASS : 23 and take away the atomic number, 11
which gives us 12 NEUTRONS 23

31. Calculating Subatomic Particles
Now complete the worksheet-both sides!
LINK

32. Progress Checker Number 1-5 in your books
Roughly how many elements are there?
Explain how the position of an element in the periodic table is related to the arrangement of electrons.
Work out the number of the subatomic particles in Helium, Neon and Argon.
What group name is given to those above elements?
EXT: Bonus! What is special about that group’s elements?

33. Swap & Mark Answers 100 (exactly 118)
Depending on what group the element is in, that group number will tell us the number of valance electrons that element has.
He: P2 E2 N2, Ne: P10 E10 N10, Ar P18 E18 N22
Nobel gases
Nobel gases all are unreactive.

34. Review 5/5 3-4/5 2/5 1/5 0/5 Where did you slip up?
Do you know where you went wrong?
Do you know what to do to improve?
5/5
3-4/5
2/5
1/5
0/5

35. Progress: End of Lesson
Stick a post it note on where your understanding of this lesson was today
How confident am I?
Where did you end up on?
Did you achieve into the Green zone?
Did you hit my target grade?

36. Homework In your planners:
Complete quick ‘n’ easy questions on periodic table
Due in next lesson- no excuses!!
– find on here if lost