 All you need to know about the periodic table and atoms 1

Elements sit on the periodic table so that atoms with similar properties lie in the same column

By the end of this unit you should know:

• what the atomic number and mass number of an element is.

• how elements are arranged on the periodic table.

• what Periods and Groups are.

• the physical and chemical properties of the group 1 metals.

• the physical properties of group 17 elements.

• the physical properties of group 18 elements

• that sodium and chlorine react violently together.

• that elements in the same group have similar properties. WHY!

Integers 4 Multiplication and division

Read through the presentation on multiplication and division. Copy the rules for multiplication and division into your notes.

Do the short quiz on multiplication and division before class on Tuesday. If you want automatic feedback make sure you use a “live” email address.

Integers 3 more addition and subtraction.

The last activity was a bit hard at this stage. Try this one to check that you can add and subtract integers using the rules.

Integers 2, adding and subtracting integers

Read the notes carefully. Copy slides 2 to 9 neatly into your notes.

Example

Q1 +3 not 3

Q2 -760

Year 9 Mathematics: Integers.

Read through the presentation carefully and then do the short quiz for homework. Please complete all homework exercises before class on Tuesday

Multiplication and GST calculations, the Angus MacPorridge method

GST (Goods and Services Tax) is charged at the rate of 15% in New Zealand.

15% is the same as 15/100 as a fraction or 0.15 as a decimal.

To calculate how much GST has to be added you need to multiply the cost by 0.15. This is then added to give the GST inclusive cost.

If you don’t have your phone handy can can you do the calculation with pen and paper?