Money, money, money...

Yup, money.

Pay up yer MONEY

1. PIBG - RM40

2. Additional Fees - RM 64.50

3. Toilet Fee - RM 2

4. T-shirt - RM4.50

Optional - Class/ Society/ Clubs Picture

1. Size 4 x 6 without border - RM 2.50

2. Size 6 x 9 without border - RM 5.00

->Size 6 x 9 with border - RM 5.00

3. Size 8 x 12 without border - RM 8.00

->Size 8 x 12 with border - RM 8.50

That should be all about money. Next up are just regular announcements.

Announcements

1. Those who have not submit their Chem PEKA, do it tomorrow.

-> This announcement is targeted especially at Colin, Ethan and... I forgot who.

2. PJ tomorrow for boys. For girls, I don't have any clue. (Update DESPERATELY needed)

3. To BSMM - formerly PBSM - members, there will be a meeting this Saturday. Refer to the BSMM board or SP's BSMM blog here.

p/s: That should be all. I heard Chen went for a surgery -specifically, I don't know what surgery-, so he might not be able to present himself in about a week. Let's all pray for his well being.

I'm out of ideas for the title....~~~ sienz

Haha, it's been quite some time since the last post, eh? I've been kinda busy with the new layout. Just a few reminders and notifications....

Biology

We'll be conducting an experiment on Wednesday. The experiment revolves around the concentration of solutions, I think. So, I'll advise you to bring a potato for yourself. Although you'll be in a group of 4, it'd be better if you just bring one just in case other group members didn't bring their share of potatoes. Just make sure the potato isn't too small. We need to observe what would happen to it. 

Ah, I just remembered there were still some of those who didn't get their Paper 3 exercises. The one on the erythrocytes.So if you want the exercise, come and see me. I still have a few more copies with me. And thats all for Bio.

Secondly is Physics

Yah, physics PEKA. Tomorrow's the deadline. Submit your PEKA tomorrow. Don't really have much to say about this. So, that's it lah. Oh yah, there's still another thing. Prepare a report on your rocket.

Next is Results Slip

If your name is listed here, please bring your Results Slip tomorrow.

a) Alvin

b) Veno

c) Vinod

d) Arina

Yeah, bring it tomorrow, kay? I only need 4 more. I've been holding 33 of these since the last 2 or 3 weeks, so please help me get rid of the extra load in my bag. XD

Chemistry

Those 10-12 pupils who haven't pass up your exercise book, please do so. The deadline was weeks ago. Chances had been given. Just don't take things for granted. What's the point of giving chances if you don't try your best to use it to the fullest? Ah and yes, summarise the notes on chemistry located below. Or just use this link if you're lazy.

Bahasa

Haha. Pass up your Karangan book tomorrow. The essay is about the Rumahku Syurgaku letter, if i'm not mistaken. So, finish it up and I'll collect it first thing tomorrow.

Add Maths

We'll be having extra class this Friday until 12:50 pm. So, inform whoever is picking you up that you'll be a bit late.

PJ (For boys)

Directed to all 4M/J boys. We'll be having PJ on Wednesday to finish up the SEGAK test. There'll be a bit of push-ups and sit-ups, i think. So, best prepare yourself if you feel like impressing some anonymous person. Isn't that right, Nic?

Science & Maths Society

The S&M society is organizing Explorace as part of their participation in the Academic Month. The race is open to all morning-session pupils. A fee of RM4 will be charged on each group and each must have only 4 group members. No more, no less than that. Further information can be obtained at the S&M notice board located on the ground floor of Block B. Or if you don't like walking to the board, you can always have the walking board, Parri, come to you instead. XD

I don't think I want to bring up anything about the Sport's Day. So, that's the end of the first post for the new layout and that's all until the next post comes, I guess.

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
  

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.

1. Reaction with water.
2. Reaction with chlorine gas.
3. 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.

Observation

Metal	Observation
Lithium	Lithium floats on the surface of the water with with 'fizzing' sound. Colourless gas is released around the metal. Lithium metal moves slowly on the surface of water. The gas released can be ignited. If the gas is collected in a test tube, and then a lighted wooden splinter is brought close to the mouth of the test tube, a "pop" sound is heard. The solution turn blue when it is tested with universal indicator.
Sodium	Sodium also floats on the surface of the water with with 'fizzing' sound. Colourless gas is released around the metal, as what happen to lithium. The lump of sodium moves swiftly on the surface of water. The gas released can be ignited. If the gas is collected in a test tube, and then a lighted wooden splinter is brought close to the mouth of the test tube, a "pop" sound is heard. The solution turn blue when it is tested with universal indicator.
Potassium	Sodium also floats on the surface of the water. It reacts violently with water. Colourless gas is released around the metal. The gas produceed is ignited by the heat release by the reaction itself. If the gas is collected in a test tube, and then a lighted wooden splinter is brought close to the mouth of the test tube, a "pop" sound is heard. The solution turn blue when it is tested with universal indicator.

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

Reaction of alkali metal with oxygen gas.

• 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

Reaction of alkali metal with oxygen gas.

• 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..!!!

Let's do SUKANTARA

Based on the above title, i'm sure all of you know what does it mean. We have Sukantara tomorrow. Boys, please wear or at least bring your PJ clothes tomorrow. Girls, I seriously have no idea but most probably you'll be having Sukantara too. 

Yes, I know. The posts are getting shorter post by post. There just isn't much to write lately. Well anyway, just wanted to say Happy Birthday Reenisha!!! That should be all for the paragraphic article. The rest looks better in point form.

_________________________________

<--Reminders-->

1. Bring your own cup tomorrow unless you're willing to pay more for your drinks. Tomorrow's recess is from 10.30 to 11.25 am. (Information credits goes to Alia)

2. Print the Chem checklist. The link is in the previous post.

3. Those who haven't done their Lisan yet, please prepare. You can do it tomorrow in class during recess. If i am not mistaken, that is.

4. This is the most important thing. Do all your homeworks and BE HAPPY... XD (Yes, I noticed it too. I'm not being formal any longer)

MON(DAY) = HO^LI(DAY)

As most you would have known, Monday is a holiday. Unless you're going to the Maulidur Rasul celebrations, that is. I really have nothing else to say so, I'll just get to the point.

1. Pn Wong ask us to print this http://smkbsa.net/english/CHECKLIST.htm. Please print it and paste it... somewhere? I forgot where we should paste it, DX. Nevermind that, the main thing is that you must get a hardcopy of it.

2. Anyone who's interested in 'Pidato' or 'Bahas ala Parlimen' or 'Mendeklamasikan Sajak', please inform me by.... next week.

3. Please bring a 10sen coin to school on Tuesday. I need to photostat your Physics exersice. It's just one page. Don't expect me to be doing charity work. I did that once, and i'm not planning to do it again anytime soon.

4. UPDATE: You can't use 'Di samping itu,' as penanda wacana anymore. It's not accepted because 'itu' refer to something abstract. It can still be used in a normal sentence, though. But the phrase must be followed by a concrete object. Eg. ... di samping sebuah rumah... In this case, the house is the concrete object. For more information and updates, please inquire Pn Wee.

So, that should be all. Anyone who needs some notes to be posted, please request it. I know i've mentioned this around 8 times, but please request if you ever need any. Don't come to school and complain to me i'm not posting any notes up here like Richard did. (I'll only post unrequested if more than 7 students is not in the class) If you need any, please request through the inquiries option. Don't ask for solutions or answers of a certain assignment, maybe i'll post a guide but never an answer. So, don't ask for answers.

Welcome to March... Goodbye February 29th

I know... the title should have been used in the previous post but it was kinda messed up and i'm lazy to edit it  XD. -Back to formal language-

Welcome to March. A lot of activities awaits us this month, in my perspective at least. Sukantara is going to be held soon. So, please train yourself if you want your sports house to win. That should be it. The rest would be more effective in point form.

<----|Reminders|---->

1. Complete your Sivik project by tomorrow. I'm not so sure what would happen if you send late too anyway. So, just suit yourself.

2. Complete all your other homeworks.

---> Mod Maths - Assessment 1 corrections (Book ?)

---> Add Maths - Chapter Review Q1, 2, 9,11

---> Bio - I have no idea

---> Chem - Quick Review pg30. Do all of the Q's.

---> BM - Please complete your Karangan about water pollution and KOMSAS.

That's all for tomorrow, I think.

p/s: Arina.... I'm still waiting for the pics. Please send it before the holiday starts. Anyone who wish to speak up their mind or just want to post something good here (no nonsense, please) inform me personally at school. I'll send you the login details through your mail. That would be all. If you have any important requests or questions, please use the inquiries option.