1. LESSON 1 YR 10 SCIENCE
-describe and identify the structures within an
atom
-identify elements using information about the
numbers of protons electrons and neutrons
2. DO NOW
List all the things you can
remember about atoms and
molecules
3. ATOMS ARE NOT BOHR….ING
Quick revision
Bohr- Chadwick Model
Atom was mostly empty space
Atoms contained Protons, Electrons and Neutrons
Atoms had invisible rings of force that held these
things in place
That the electrons in these rings can change their
positions when they are part of a chemical reaction.
4. TEENY TINY INCY WINCEY
THINGS
Other wise known as ATOMS
What is smaller than an atom?
Structure of an atom
Protons (protons)
electrons (negative)
Neutrons ???? YOU TELL ME.
7. STRUCTURE OF ATOM
Depending on their energy they are locked into a
certain area in the cloud.
Electrons with the lowest energy are found
in the energy level closest to the nucleus
Electrons with the highest energy are found
in the outermost energy levels, farther from
the nucleus.
8.
9.
10.
11. The Atom
All matter is made up of atoms.
The atom is the smallest particle of a matter. It
cannot be broken down anyfurther by chemical
means.
12. What is a molecule?
A molecule is a particle with two more
atoms chemically joined together, but not
necessarily of different elements. The
physical particle of a compound is called
a molecule.
13. Work sheet time.
Calculating neutrons
Complete this worksheet now and finish for
homework.
Fredo’s for those that can complete the WHOLE
sheet correctly.
16. CONSERVATION OF MASS
What’s wrong with Harry Potter??
You can’t make something from nothing.
Why do we learn this?
17. THE LAW
Antoine Lavoisier'
Discovered the law
The mass of a closed system
must remain constant over
time.
Mass can not be created or
destroyed only rearranged .
Example:
H22 + 0+ 022 2 H2 H2200
18. CONSERVATION OF MATTER
EQUATIONS
Balancing equations
So we know that
when chemical reactions take place
chemicals are changed into new compounds.
We show this symbolically using a chemical
equation.
19. Balance it and make it
Model experiment
Aim:
To understand the structure of compounds.
You will be physically balancing the equation.
Method:
Each station will have a task card with a chemical
formula and a large arrow.
1. Fill in the table before you start.
2. You are to make the structure of the formula
3. Keep the formula models on separate sides
of the arrow
4. Using the conservation of mass theory try
and balance the equation by building more
elements .
20. Complete the organiser for each task
Compound Name Number of each
element
NaNO3 Sodium nitrate Na
N
O
PbO Lead Oxide Pb
O
Editor's Notes
By 20th Centery they knew that atoms were mostly empty space----draw circle with tiny dot
They knew that atoms were made of stuff.
All of this weighs something bc everything has mass. Protons and Neutrons weigh about the same but electrons are soooo light they are about 1800 times lighter than electrons.
An atom on its own has a neutral charge of energy
We know that they are made up of all these little things which all carry a charge
It is the number of protons in the middle that determine what the atom is. Every atom has a different number of protons in the middle. The number of protons is called the atomic number
Protons and electrons are equal so the element is stable and neutral. If the atomic number is the number of PROTONS in an atom. Atomic mass is the number of protons AND neutrons
So you know about the structure of the atom now why do we even need to know this?
Discuss what you need to create things
What do you get when you make a reaction?
Why do we learn this? Chemistry is really cooking in the lab. If I was to bake a cake all the ingredient I put in would equal the mass of the cake I got out of the oven. If I pulled the cake out and there was just this tiny cake I’d know that 1) I’m a terrible cook 2) that there has been a reaction of the ingredients and some have changed into gas or in this case probably a lot of smoke and ash.
Chemistry is just like this I put in some ingredient and see what I get out on the other side. If what I get out doesn’t equal what I put in then what has happened to the other bits.
As part of chemistry you need to be able to demonstrate what is happening in an equation so we can see that you are understanding the reactions that are taking place.
Discuss example- write as a word equation
Hydrogen plus oxygen equals dihydrogen oxide
Draw the atoms out