I have doubt in this Chemistry question... Pls help me.

[Milo]

I've lost count of the number of times I've proven teachers wrong, from Pri to Postgrad level.

 

 

 

Yeah! The student even asked again the next day but she still insists 5 elements. She sounds confident in her answer.

[Milo]

So according to the teacher hydrogen H2 and ozone 03 are 2 and 3 elements respectively?

 

 

 

Then, it is very weird.

[Sosaria]

Yeah! The student even asked again the next day but she still insists 5 elements. She sounds confident in her answer.

 

A few possibilities:

 

(1) The teacher confused "element" (English term with very specific meaning in chemistry) with "elementary particles", i.e. atom. So she insists that there are 5 "elements" when she's actually meaning 5 "elementary particles". As someone has said, maybe it's FT teacher with poorer command of English (since the basic requirement here is to teach Science).

 

(2) Assessment book mistake... can happen nowadays a lot of teachers just use worksheets from assessment books. There are no controls here and many, many companies printing assessment books, some of which do contain mistakes. Many teachers do not check before use, just follow the answers given... after all, can ultimately blame the book author/publisher.

 

(3) Student's version of the story sometimes cannot be 100% believed. They sometimes have "alternate" view of what really happened or use the wrong words for description. Always double-check what is the true story... I have school-going kids and when they were younger, i had quite a few surprises acting on what was reported vs. what I found out after talking to teachers and others involved

[Milo]

Thanks guys! I have got the answer I want. The question was clearly written in a piece of paper with answer 5 by the teacher.

[Mllcg]

Thanks guys! I have got the answer I want. The question was clearly written in a piece of paper with answer 5 by the teacher.

 

 

its 3 elements

 

Fe: Iron

C: Carbon

O: Oxygen

 

since where is there 5 elements?

 

5 atoms yes. but not 5 elements.

 

 

[VenomMX]

I think 3 elements too. However, one Science teacher in Marsiling secondary insists that there are 5 elements...

 

3 elements.. 5 atoms.. End of story

[Seaweed]

u are the student of the student's parent ?

[Gearoil]

TS must be an idiot too to try to prove whether ppl who teach can be right or smart or both....

 

If the person has the two 'elements' of being right and smart.....

 

THAT PERSON WOULD NOT LAND UP BEING A TEACHER!

 

And how many times have I posted the above phrase!

[Sosaria]

TS must be an idiot too to try to prove whether ppl who teach can be right or smart or both....

 

If the person has the two 'elements' of being right and smart.....

 

THAT PERSON WOULD NOT LAND UP BEING A TEACHER!

 

And how many times have I posted the above phrase!

 

You can't say that you know... I have couple frens switched to teaching from the 'rat race' in private sector.

 

Teaching, to them, is ideal job after dropping out of 'rat race'... it's an 'iron' rice bowl, and as long as they handle the admin work and deal with people in a 'smart' way (which they would've learnt to do after years in private sector)... no worries. Every day fixed time, no sudden on-call. Got fixed vacation period some more on top of public holidays. Salary is not excessively high, but not to be sniffed at either, especially for those coming from private sector where they try to match the pay.

 

"Smart" move, definitely.

 

Those who refuse to consider teaching, is sometimes because don't have the patience to teach, or don't have the patience to handle students/parents, or poor student management skills - very important now that students are getting noisier and noisier. Else, would've joined the bandwagon already.

Edited October 6, 2011 by Sosaria

[Hiphiphoray]

Iron + Carbon + Oxygen =Rust.

 

i thought Rust = Fe2O3

 

http://en.wikipedia.org/wiki/Iron(III)_oxide

 

[Mightymito]

If you put a lump of pure iron in front of the teacher and ask : how many element(s) are there?

 

The teacher's answer would be " I dont know , its impossible to count"

[1fast1]

If you put a lump of pure iron in front of the teacher and ask : how many element(s) are there?

 

The teacher's answer would be " I dont know , its impossible to count"

 

If the lump of iron weighs 55.845g, I can confidently say there are 6.0221415 X 10^23 atoms, or what she might call "elements".

[Jrage]

think the teacher may be right..

The question is how many elements are there... Not how many different elements are there.

 

 

 

A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.

 

We can say the world is made up of at least 118 different type elements, but we cant say the world is made of 118 elements.

 

Edited October 6, 2011 by Jrage

[Mightymito]

If I have one blue car, one red car and three yellow cars, how many colours are there?

[Jrage]

hmmm.. as mentioned.. you need to understand the definition of a chemical element to answer to this question.

 

http://en.wikipedia.org/wiki/Chemical_elem...emical_elements

 

 

[Jrage]

hmmm.. as mentioned.. you need to understand the definition of a chemical element to answer to this question.

 

http://en.wikipedia.org/wiki/Chemical_elem...emical_elements

 

 

[Jamesc]

Iron Carbonate

 

Consisitng of Iron, Carbon, Oxygen

 

aka....RUST rah!!!

Iron Carbonate is not Rust.

 

Rust is Iron Oxide lah.

 

[Mightymito]

So according to you planet earth has a gazillions of elements like the planet from the other dimension you come from