Secondary 4 Chemistry resources found from internet

Hi friends,
 Under these exceptional times, here are some notes and questions which I have found from internet for use during home based learning.
 They are in a zipped file. So just download from this link below and unzip the files and you are ready to use the notes.

 Keep safe!!

https://drive.google.com/open?id=1MSabkSrU0YyPeWg3GBAUBwpAQRQzLJeP

here are some Powerpoint notes for Normal-Academic students. However, combined science students may use them but the syllabi do differ. So please take note.

https://drive.google.com/open?id=11_Mw1U5zZ9829sgCTVuqHc6ao30vIuZd

Best regards,

 
Mr Chong

P / S online 1-1 interactive and live online tuition  is available from me.
Sample :
1.  How many subatomic particles are there in the isotope, uranium-239?


electrons
neutrons
protons
A
91
146
92
B
91
147
92
C
92
146
92
D
92
147
92




X is a transition element. Which of the following shows the correct chemical formula of a substance containing X?
A
X2
B
NaX
C
XSO4
D
XH3XOOH




Four elements, A, B, C and D, are shown in the outline of the Periodic Table below.

























C


D
A








B




































Element 1 forms a chemical compound with Element 2. Which of the elements could be Element 1 and Element 2?
Element 1
Element 2
A
A
D
B
A
B
C
B
C
D
C
D




Which statements about an ion are correct?

I
It can be formed when an isotope loses an electron.
II
It can be formed when an isotope gains an electron.
III
The element hydrogen can form two types of ions.
IV
A polyatomic ion is always negatively-charged.

A
I, II only
B
III, IV only
C
I, II, III only
D
I, II, III, IV

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