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Welcome To Grade 8 Chemistry! PowerPoint PPT Presentation


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Welcome To Grade 8 Chemistry!. Semester 2 2011-2012. An Introduction PPT from Mr Fedley. http://www.shagtees.com/cgi-bin/store/cpshop.cgi/1826209118/shagtees/5696358. Today’s Lesson. Some Housekeeping Our New Unit Particle Model Atomic Theory Model. Housekeeping.

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Welcome To Grade 8 Chemistry!

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Welcome to grade 8 chemistry

Welcome To

Grade 8 Chemistry!

Semester 2

2011-2012

An Introduction PPT from Mr Fedley

http://www.shagtees.com/cgi-bin/store/cpshop.cgi/1826209118/shagtees/5696358


Today s lesson

Today’s Lesson

  • Some Housekeeping

  • Our New Unit

  • Particle Model

  • Atomic Theory Model


Housekeeping

Housekeeping

  • I love chemistry (aka got bored of Biology) so much so I decided to start our new unit today.

  • Our Evolution test will be on Friday the 3rd of February 2012

  • There will be a PPT/Revision/Study Guide Questions available on Friday this week.

  • We will also be getting results for your Teaching Toolbox probably on Thursday.


Our new unit

Our New Unit

  • Our New Unit Is: Chemical Reactions

  • Our Assessment Tasks will be:

    • Essay

    • Design Task

    • Test

  • This unit will go until at least holidays.

  • Our unit question is: How can chemicals reactions affect different environments?

  • Area of Interaction: Environments

  • Significant Concept: Chemical reactions, along with reaction rates play an important role in how fast reactions can occur.


Let s explode some stuff

Let’s Explode Some Stuff

  • Yes – we are finally exploding some stuff.

  • Elements in the first Period (Row) of the Periodic table react violently with water.

  • Today, we will look at Sodium (Na) and Potassium (K).

  • Please be careful and listen to my instructions. This is dangerous!!


Basic chemistry ideas

Basic Chemistry Ideas

http://www.learner.org/courses/essential/physicalsci/session2/closer3.html

  • Everything is made out of small particles that are too small to be seen.

  • These small particles always move around. How much they move around depends on if they will be a solid , liquid or gas.

http://blackcoolhairstyle.blogspot.com/2010/06/mercury-liquid.html

http://inyoprocess.com/white-papers-mainmenu-5/9.html?task=view


Solids liquids and gases

Solids, Liquids and Gases

  • If a particle is heated, then it becomes more excited and moves around more.

  • When a particle moves around more, their bonding (how they are held together) can become broken and they change state (eg Liquid to gas)

  • The opposite happens if a particle is cooled. That is, the particles are less excited and move less. They can form new bonds and they change state (eg gas to liquid)


What are atoms

What Are Atoms?

  • According to the dictionary, atoms are ‘the smallest particle of an element that can exist either alone or in combination’.

  • In English, an atom (原子) is the smallest thing that we can see under a microscope. Everything is also made of atoms.


Some deciphering

Some Deciphering

  • Everything is made up of particles (粒子). These particles are made up of different atoms that have different properties (プロパティ).

  • You can almost think of atoms as ingredients in food. We have 100 or so ingredients.

  • When we make a cake, it will have different properties depending on it’s ingredients.

http://www.frequentbakes.com/our_menu.htm

http://goodstufffood.com.au/products.php?product=SWE&subproduct=CAKES


The periodic table our ingredients

The Periodic Table – Our Ingredients


Differences in atoms

Differences In Atoms

  • There are over 100 atoms.

  • Every atom is different as it contain a unique number of neutrons (中性子), protons (陽子) and electrons (電子).

  • An electron is found in an electron shell and has a negative charge (負電荷).

  • A proton is found in the nucleus (核) and has a positive charge (正の電荷)

  • A neutron is also found in the nucleus and has no charge (ない手数料なし).


Atoms

Atoms

Atoms are the “building blocks” of all matter and are the simplest form of molecule. They are all made up of protons, neutrons and electrons. They look something like this:

The Nucleus – this contains neutrons and protons

Electrons – these orbit around the nucleus


Atomic mass number

Atomic & Mass Number


It s activity time

It’s Activity Time

http://vatasalgupta.files.wordpress.com/2010/04/excited.jpg


Electron shells

Electron Shells

  • In a stable atom, the atomic number tells us how many electrons or in the atom.

  • Atoms are found in electron shells (電子殻) which take up most of the space of each atom.

  • Different electron shells can hold different amounts of electrons

    • Shell 1 holds up to 2 electrons

    • Shell 2 holds up to 8 electrons

    • Shell 3 holds up to 8 electrons


Electron shells continued

Electron Shells Continued

  • The shells in in order, starting with the inner one (lowest energy level)

  • All the elements in a group have the same number of electrons in the outer shell

  • The group number is the same as the number of outer electrons

  • Period 0 (Noble Gases) have full shells.

  • The period number states how many shells there are.


Periodic table worksheet

Periodic Table Worksheet

  • Go to the wiki – http://yisgrade8.wikispaces.comand download the worksheet called Periodic Table Worksheet 1

  • Complete the worksheet, using a periodic table (provided or in diary)


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