seperating mixtures

how to seperature sand from a mixture?

-> actually it depends on what the mixture is. if it were sand and water, we could just use a filration paper or just boil the water till the water evaporated, leaving only the sand behind.

or another example is separating sand from a mixture dirt.Take 100 ml beaker, pour the mixture, and stir with a stirring rod 10- 15 minutes. Once done, let the beaker to stand for 20-30 minutes. as time goes you will see the different layer in the beaker with sand at the bottom of beaker as it is heavier than dirt and then a layer of dirt on it.

iron + mixture?

-> you can use a strong magnet to attract the iron as the iron is magnetic.

solid + mixture?
-> 4 methods are commonly used for seperating mixtures from solids.

1.filtering

2.evaporating

3.crystallizing
4.Centrifuging

This is evaporation .

for the rest so sorry, can't find pictures.

air + mixture

->lets say that the mixture is water. in this case, we are able to use a separating funnel as petrol which acts like oil, floats on water.

sorry for the drip drop information. can't find anything about it. o-O

elements part 3

i have found other types of periodic table. there are circular table and helical tables that is better than the mundane rectangle-ish table. i wonder how they group the elements. i think it is the same. anyway, this is the circular periodic table.

this is the helical table. i personally dislike this table as it is very messy.i think that the rectangle periodic table really helps us to understand better as i think we are more acostomed to the rectangle table.

oh this is the chinese periodic rable. each letter represents an element.

continue from elements

these questions could be found on the academic portal, at the announcements.

1.Is the version of the Periodic Table we're using the ONLY version?
Ans: there should be more than 1 type of periodic table as maybe some people do not know how to speak, for instance, english, so it would come in many language, but maybe that is not the main point. there should be other ways of grouping the elements in the table. but maybe as years progresses, the periodic table might expand and who knows, maybe somebody great would again simplify the table? but again, there would be a lot more new elements that would be added into the periodic table and there might be chance that the table would not be simplified but instead, become larger?? :)
2.How do scientist in other parts of the world come to a common understanding about the elements?
Ans:wow! that is a very difficult question to answer. it seems that maybe scientist just find the elements by themselves and maybe get together to provide their findings? or maybe, one scientist tell other scientist as you/we cannot work alone.as the saying goes, no man is an island, so they discuss with each other and the message goes on and on....that is just what i think only. arghhh.can't find but this should be it.

elements song

this is the link for the elements song:
http://www.privatehand.com/flash/elements7.swf

if you want to know what is the first 20 elements of the periodic table, read on. frankly speaking, i find the names too ridiculous to believe. it sounds too alien and majority of the names are like too impossible to pronounce. ireally wonder how the man who sung the song was able to pronounce the words and sang them in estimated one breath.

if i am not wrong, this should be the first 20.
1.hydrogen (H)
2.helium (He)
3.lithium (Li)
4.beryllium (Be)
5.boron (B)
6.carbon (C)
7.nitrogen (N)
8.oxygen (O)
9.fluorine (F)
10.neon (Ne)
11.sodium (Na)
12.magnesium (Mg)
13.aluminium (Al)
14.silicon (Si)
15.phosphorus (P)
16. sulphur (S)
17.chlorine (CI)
18.argon (Ar)
19.potassium (K)
20.calcium (Ca)

link for the lyrics:
http://www.ncl.ox.ac.uk/talkweb/elements.html
gosh, it sounds so funny!

just to show you the periodic table.