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Year 9 Chemistry Introduction Lessons

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Kieran Schlechter

on 18 May 2016

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Transcript of Year 9 Chemistry Introduction Lessons

Year 9 Chemistry Introduction Lessons
Introduction
These Lessons will cover:
What is an Atom?
The Periodic Table
Chemical Formulae
Chemical Equations

Chemistry
Chemistry is the study of MATTER. It helps us to understand what matter is made of and how it interacts with other matter.
Atoms
The Periodic Table
Learning Aims:
Find out more information about the creation of the periodic table
Discover how the Periodic table is ordered
Understand the meanings of 'atomic number' and 'mass number'
Chemical Reactions
Follow the powerpoint at:
O:\Teacher\SCIENCE\1A YR9 FOUNDATION LESSONS\Chemistry\L4 - Chemical Equations
and complete the accompanying worksheet
What do you think Atoms are?
Watch the video for the first minute and write your own definition of an atom on your whiteboard
What are atoms?
OK;
Now swap with a partner
Do they use keywords that you have forgotten?
Have you got a suggestion for how they could improve their definition.

Make your changes...
Then we'll share with the rest of the class.

Then check out the next video
Draw one on your whiteboard, try and label it if you can.

You have 1 minute, then you can hold it up for everyone to see
So what else do you know about atoms?
Hold them up for everyone to see
What have you remembered that other people haven't?

Is your diagram missing something?

How many types of atoms are there?
Where could you find out?
It lists EVERY type of atom (element) in the Universe and it tells you a lot about the elements if you know how to use it.
The Periodic Table
Learning Aims:
Work out what an atom is
Find out what they are made of
Discover how many types there are and where to find out
Learning Aims:
All matter is made of atoms
Atoms are incredible small particles
There are around 100 different types
Atoms are made of 3 smaller particles (protons/neutrons/electrons)
So What did we learn today?
How many are metals?
How many are gases?
Which one is the lightest?
Prep for next lesson
Find out which is your favorite element.

To PROVE how much you love it, put together a flash card of information.
What is it named after?
How heavy is it?
Where do you find it?
But most importantly... WHY is it your favorite!
Draw a line on the top of it's box,
Then down it's right hand side,
then across the top of the next box...

Continue this until you have drawn a 'staircase' to the bottom of the table
Find Aluminium on your Periodic Table
So who invented the table?
How is your periodic table ordered?
What does the term 'atomic number' mean?

What does the term 'mass number' mean?

You have 5 minutes to find the answer and write it onto your periodic tables...
All of the elements to the LEFT of the line are METALS
The rest are NON-METALS...
Label your Periodic table now so you don't forget

Then use this to work out the answers to the following questions...
If it's a METAL put up your LEFT hand
If it's a NON-METAL put up your RIGHT hand...
Ready.....
GO!
Copper (Cu)
Metal
Mercury (Hg)
Non-Metal
Nitrogen (N)
Calcium (Ca)
Chlorine (Cl)
So you can tell is an element is a metal or not by using the periodic table!
Ready...
GO!
Compare your definitions with those of your neighbours.

What are the differences and could you improve yours?
Time to share...
Atomic Number
The number of protons in an atom's nucleus
Mass number
The number of protons AND neutrons in an atom's nucleus
Let's see how much of this we can put together

Use your periodic table to find the answers
Quiz time...
How many protons does Helium have?
What is the mass number of Bromine?
80
Which non-metal has a mass of 14?
N
Inside Atoms
electrons are VERY small, so small that they don't have a mass
They are negatively charged -
Protons have a mass of 1 and are positively charged +
Neutrons have a mass of 1 and have no charge (they are neutral)
Now fill in your table with this information
We know that the nucleus has both protons and neutrons inside of it

But we can use the periodic table to work out HOW MANY of each there are.
The Nucleus
Working out the Neutrons
If I have a bag of 40 apples, 18 of them are green...

How many are red?

Working out the number of neutrons is the same process
This is the number of things in the nucleus (apples in the bag)
this is how many of them are PROTONS (green apples)
So... Potassium has 19 PROTONS and 39 - 19 = 20 NEUTRONS

Now try the worksheet yourself
The Periodic Table contains all of the different types of atom in the Universe
The atoms are arranged in order of 'atomic number'
The 'atomic number' is equal to the number of protons that an atom contains
The 'mass number' of an element is equal to the number of protons AND neutrons in its nucleus
So what did we learn today?
Learning Aims:
Find out how atoms join together
Work out what Chemical Formulae can tell us
Be able to build models of simple molecules using their formulae
Chemical Formula
Use your whiteboard to write down as many chemical formulae as you can think of.

Once you get started, you might find that you know quite a few!
Which chemical formulae do you know already?
OK swap with your partner and compare...
How many did you each manage to come up with?

Are they all real formulae? Or did you make them up?

Are there any that they have got that you have not?
What is it made of?
What is it's name?
Where might you find it?
Anything else?
What can you tell me about this then?
How many of each type of atom are there?
Use the molymods to build...
The grey sticks that you used to join the atoms together to make molecules, are called BONDS.

Different atoms can have different numbers of bonds.

Take a look at the number of holes in each type of atom and write down how many bonds it can make.
Bonds
Full transcript