Thursday, 30 April 2009
Duty board
cus we keep getting "kelas tercantik" for quite a few times...lol
so here we go.. a list of names with their respective duty.
NO | BIL | NAMA | Subject |
1 | 16545 | AKHILASH ARAVIND A/L DINESH | Bahasa Melayu |
2 | ALVIN CHACKO THOMAS | Bahasa Melayu | |
3 | 16547 | ASHMEER B. ANUAR | Bahasa Melayu |
4 | ASHWIN A/L SRIGANTHA | Bahasa Melayu | |
5 | AZMIL B. ABDUL MALEK | English | |
6 | 16548 | CHEN WIN SUM | English |
7 | COLIN RAY SELVAM | English | |
8 | ETHAN LU ZHI MENG | English | |
9 | 16551 | FU HSU HUI | Sejarah |
10 | GOWRI A/P MARIAPPAN | Sejarah | |
11 | JASMEEN LORNA | Sejarah | |
12 | JOHANAN KONG XIAN EN | Sejarah | |
13 | KEITH DANIEL | Mathematics | |
14 | 16555 | LIM SZE KHAI | Mathematics |
15 | MOHAMAD AQIL MAULA MOHAMAD OMAR | Mathematics | |
16 | MUHAMMAD AMEER SYAFIQ B. GHANI | Mathematics | |
17 | 16594 | MUHAMMAD SHARIFUDDIN B. AZLAN | Physics |
18 | NAVEENAN A/L VIJAYA KUMAR | ADD. Maths | |
19 | NICHOLAS CHONG GUAN TING | ADD. Maths | |
20 | ONG RAYXIANG | ADD. Maths | |
21 | PRIYAA NAIR A/P RAMESH | Moral | |
22 | 16846 | PRIYANKA RAJ A/P PRITHVI RAJ | Moral |
23 | 16569 | RAJA ALIA FATIMA BT. RAJA ABDUL AZIZ | Moral |
24 | REENISHA DEVI A/P RAMACHANDRAN | Moral | |
25 | RICHARD NAVINDRAN | Physics | |
26 | SALMAN B. FEROZ | Physics | |
27 | SHANTAVINASHNI A/P BALACHANDRAN | ADD. Maths | |
28 | SIK JIA YIN | Physics | |
29 | SUGUMARAN A/L MUNIANDY | Chemistry | |
30 | SUHAINI BT. AMIR | Chemistry | |
31 | T. PARRIMALAN A/L THIRUCHELVAN | Chemistry | |
32 | 16572 | TAN EE CHEE | Biology |
33 | VENOTHANI A/P RAJAGOPAL | Biology | |
34 | VINODRAJ A/L BALAN | Biology | |
35 | 16577 | WAN MUHAMMAD HABIBULLAH | Agama |
36 | WAN NUR ARINA BT. RASHIDAN | Agama | |
37 | 16614 | ZAIM ISKANDAR B. MOHAMAD ZABIDIN | Agama |
Find information about your corresponding subject and prepare it by this weekend
(3 May 2009)
And bring them on Monday.
Bring a wrapping paper for your own table too.
Wednesday, 29 April 2009
Gave us work Pn. Wee
(i skip the notes)
A. Tukarkan ayat susunan biasa di bawah ini kepada ayat susunan songsang.
i)Dia ke rumah awak petang semalam.
ii) Novel itu habis saya baca.
iii) "Nama awak siapa?" tanya ibu.
iv) Kita tidak perlu panik jika dipatuk ular sawa kerana patukan ular sawa tidak akan mendatangkan maut.
B. Tukarkan ayat susunan songsang kepada ayat susunan biasa.
i) Saya tendang bola itu ke arah pintu gol.
ii) Jika saya belajar bersungguh-sungguh, saya akan berjaya.
iii) Adalah sukar untuk melepasi halangan itu.
"Siapakah Ahli Dewan Undangan Negeri di kawasan ini?" tanya Ahmad.
Tuesday, 28 April 2009
Posting Temporarily Disabled : Comments Guide
Comments/Inquiries Guide
I never posted this before. So expectedly, I never really know who is posting the comments up.
Knowing that, I think I better post a brief guide on how to comment. Sounds petty but I prefer the blog to be more organized.
How-to-comment:
1) Click the "n INQUIRIES" link at the bottom of any post. (n refers to the number of inquiries written earlier)
2) Type whatever you want to type there. And;
3) Press the arrow in the Comment as: box and choos which option you prefer.
OR
3) You could simply place your signature there. Eg: Yours til i trip (Arina)
4) Lastly, press the Post Comment button.
That should cover it.
Last but not least, don't believe that "im Deleting the Blog... bal bla bla" line in the cbox. I didn't put that up. My name would always appear orange in the cbox. Anyway if any of those things appear again, inform me immediately.
That's all for now. Oh yah, Hilman said Hi... XD
Friday, 24 April 2009
All in One day
Chem - do the quick review questions on page 65, 69 and 72..
Bio - finish up your PEKA and do the exercise from the papers handed out..(do til page 8 i think)
Maths - do the ones given on the board...
Add. Maths - as some of you go home early or go camp.. I'll write down the works here..
Do chapter 6 formative exercise 6.1 pg 92 question 1, 3 and 5..
That's all only heh..
Sekian, terima kasih XD
Tuesday, 21 April 2009
Dear Habib,
Yours til i roll,
ARINA :D
Monday, 20 April 2009
I'm out of ideas for the title....~~~ sienz
Tuesday, 14 April 2009
3, 2, 1, Launch
Monday, 13 April 2009
Physics Ex 2.4 Compiled
(i) the velocity of the lorry in the initial 15 minutes
(ii) the initial velocity of the lorry
(iii) the deceleration of the lorry
(b) A steel ball of mass 1 kg is dropped vertically from a table as shown in Figure 1(which habib will post later). A bucket of sand is put beside the table so that the steel ball can drop into it.
Group 1 - chemical properties for 4J, 4M, 4S through 4M
CHEMICAL TRENDS
- Reactivity increases when going down Group 1.
- The valence electron of the atom is further away from the attraction of its positive nucleus.
- The inner electrons shield the outer electron from the nucleus attraction
Chemical Properties
- Group 1 metals are very reactive metals.
- They all show the same chemical properties.
- They can react with water and non-metal such as oxygen and chlorine to form a new compound.
Electron configuration
Lithium | 2.1 |
---|---|
Sodium | 2.8.1 |
Potassium | 2.8.8.1 |
Rubidium | 2.8.18.1 |
Cesium | 2.8.18.18.1 |
Francium | 2.8.18.32.18.1 |
- Table above shows the electron arrangement of all the Group 1 metals.
- All the atoms of Group 1 metal consist of 1 valence electron.
- When an alkali metal atoms reacts, it loses the valence electron to form a positively charged ion. Example
- They tend to react mainly with non-metals to form ionic compounds.
- Reaction with water.
- Reaction with chlorine gas.
- Reaction with oxygen gas.
The Reaction of Alkali Metals with cold water
- Group 1 metal react vigorously with water.
- The video below shows the reaction of Lithium, Sodium, Potassium, Rubidium and Caesium with water.
- Click the play button to play the video or click anywhere on the player to link to the video page in youtube.
Metal | Observation |
---|---|
Lithium |
|
Sodium |
|
Potassium |
|
Discussion
- The reaction with water is highly exothermic (release a lot heat), very fast and violent.
- If a lump of lithium, sodium or potassium is placed in cold water, the metal floats, move around the surface of the water and then dissolve in the water.
- This shows that lithium, sodium and potassium are less dense than water.
- The substance produced is soluble in water.
- The colourless flammable gas is hydrogen. It produces "pops" sound with lit splint.
- Lithium and sodium do not normally cause a flame but the potassium reaction is exothermic enough to ignite the hydrogen.
- Rubidium and caesium are explosive with water. Normally, your teacher does not do this experiment in the school lab.
- If universal indicator is added, it changes from green (pH 7) to purple (pH 13-14), showing that the products are alkali (solution of hydroxide).
- The more reactive the metal, the more vigorous the reaction.
- The reactivity of the metal increases down the group.
Equation of the reaction
Lithium + Water → Lithium Hydroxide + Hydrogen Gas
Sodium+ Water → SodiumHydroxide + Hydrogen Gas
Potassium + Water → Potassium Hydroxide + Hydrogen Gas
The Reaction of Alkali Metals with Non-metals
- Group 1 Alkali Metals react with non-metals to form colourless or white ionic compounds.
- These compounds dissolve in water to give colourless solutions.
Reaction with oxygen
- The diagram above shows that when hot alkali metal is put into a gas jar filled with oxygen gas, the alkali metal will burn with bright flame.
- They form white oxide powders after reaction.
- These oxides dissolve in water to form strongly alkaline metal hydroxide solutions with pH value 13-14.
- Lithium, sodium and potassium have similar chemical properties. All react with oxygen to produce white metal oxide.
- The reactivity increases down the group from lithium, sodium to potassium.
- Table below shows the observation of lithium, sodium and potassium when burn in oxygen gas.
Observation
Lithium | Lithium burns with red flame and produces white powder immediately after reaction. When the white powder is dissolved in water, it produces a solution which turned red litmus paper blue. |
Sodium | Sodium burned with bright yellow flame, forming white powder immediately after reaction. When the white powder is dissolved in water, it produces a solution which turned red litmus paper blue. |
Potassium | Potassium burned with very bright purplish flame, forming white powder immediately after reaction. When the white powder is dissolved in water, it produces a solution which turned red litmus paper blue. |
Equation
Lithium+ Oxygen Lithium Oxide
Sodium + Oxygen Sodium Oxide
Potassium + Oxygen Potassium Oxide
Reaction with chlorine
- The diagram above shows that when hot alkali metal is put into a gas jar filled with chlorine gas, the alkali metal will burn with bright flame.
- All alkali metals react with chlorine gas to form white metal chlorides salt.
- Lithium, sodium and potassium have similar chemical properties.
- The metal chlorides salt formed is soluble in water to give a neutral solution of pH 7.
- The reactivity increases down the group from lithium, sodium to potassium.
- Table below shows the observation of lithium, sodium and potassium burn in chlorine gas.
Observation
Lithium | Lithium burned slowly with a reddish flame . A white solid is produced. |
Sodium | Sodium burned brightly with a yellowish flame. A white solid is produced. (The reaction is shown in the youtube video below.) |
Potassium | Potassium burned very brightly with a purplish flame . A white solid is produced. |
Equation
Lithium + Chlorine Lithium Chloride
Sodium + Chlorine Sodium Chloride
Potassium + Chlorine Potassium Chloride
Explaining the Reactivity Trend of the Group 1 Alkali Metals
- When an alkali metal atom reacts, it loses its valence electron to form a positively charged ion.
Example
- As we go down the group from one element down to the next, the atomic radius gets bigger due to an extra filled electron shell.
- The valence electron is further and further from the nucleus. Thus the attraction force between the nucleus and the valence electron become weaker and weaker.
- This causes the valence electron is easier to be released to form an ion when the atom takes part in a reaction.
Solubility of the Oxide, Hydroxide and Salt of Alkali Metal
- All the oxide and hydroxide of group 1 metal are soluble in water to form an alkali solution.
- All the salt (salt of chloride, nitrate, sulphate, carbonate....) of group 1 metal are soluble in water. The solution formed are neutral.
Safety Precaution
- Alkali metals are very reactive.
- Therefore it must be kept in paraffin oil to prevent them from reacting with oxygen and water vapour in tbe air.
- We must avoid to hold group 1 metals with bare hand because they may react with water on our hand.
- We must wear safety goggles and gloves during handling experiment involving group 1 metal.
*Make sure you save this post in your computer. then, in your own words, write it in your notebooks...
Your Chemistry teacher,
Mrs Wong...
with da help of Taysher and Akhilash..
XD..!!!
Saturday, 11 April 2009
zzzzzzzzzaturday
I salute the ppl who actually made the right decision of not comin to skul...
xP
there is nothing much to tell u ppl...
there was ceramah...
combined the form 4 & 5...
the ony girls form our class was me n suhaini..
i tink...
i ony saw her...
owh..
n i met up wit Mr. Shukur n asked him to delay the rocket launching day to thursday...
xD
Arina,Jo,Pari etc.. ponteng'ed' the ceramah..
kononnya working for the BP My Science Challenge..
xD...
anywayz tatz all for now...
~reeNIshA~
Friday, 10 April 2009
v CaN n WiLl chaNge wAt pN. WonG tINks BOut us!
im sorry...
I know v r family but this is getting irritating...
i dun lyk any teachers scolding us...
v might b in the science stream but...
itz time to buck up ppl!
even i hv to stop crappin at the back of bio lab...
but there is no harm in shutting up n listenin...
of course i still wan the flow of jokes but...
buck up ppl..
its time to prove ppl wrong...
the exams r coming up n v wil b better than 4J...
aite??
urs til i stop getting fatter...
_reenisha_
Saturday 'Crashing' Courses...
Okay, that's all I guess. Make sure you finish your physics project and the paperwork. The rockets will be launched on Tuesday with 4J and 4S, I think. Sorry for not posting the second part of the physics work, but I'll make sure I post it up by tomorrow. I left the exercise in the buku ponteng. =.= I know, I know... I'll make sure it's in here by tomorrow.
Wednesday, 8 April 2009
And The Majority Agreed....
So yeah, that's all lah. Make sure you bring your Results Slip for those who haven't pass it back up. And don't forget about the form about the verification of your guide's presence on Sports Day too.
Now, what's left is just... Happy Birthday Johanan and Ameer!!! Since both of you first felt a doctor's gloved hands on the same day, I put the wishes together. To Johanan, take more phosphorus, vitamin D and calcium more. Grow taller lah.... To Ameer, may your relationship with Fatin last. XD
Okay, that's all lah.... Until the next post
Sunday, 5 April 2009
Yay, free period... And of course, The Necklace
Thursday, 2 April 2009
Yes, yes, I know. This is really late.
The Fight Of The Nerds
We saw a fight between two nerds:Parri and Richard.
It all started with a friendly hit from Richard.All Parri did was just hit him back(friendlier_)and then all hell broke loose.Richard whacked Parri so hard until his specs flew to the front of the class.Then Parri unleashed the HULK in him and got up and started hitting Richard.Jasmeen got scared bcos she was sittin next to Richard.And guess what our bm teacher stopped the fight. All Richard said after that nevermind teacher, we r just playing...(Richard wat a lame xcuse).
Parri's comment: WARNING.I am Mr. Hyde...
So there you have it the inside scoop on the fight of the nerds.
Your not funny friend,
Johanan