An Elemental Approach

Ion Attraction NZ The first subject for the year is Chemistry, and the topic that we are studying is Reactions. in this topic you will learn about the formation and decay of molecules, and the different ways elements can join and separate. We will be looking at this information from an atomic perspective, and learning about the role electrons play in the various reactions. Students would have been introduced to this topic last year, and the first thing we will do is review some of that knowledge and look at the structure of the Periodic table.

The first thing that you will have to do is become familiar with the Periodic table yourself; we will be having a test in the second week to assess your knowledge of the names and organisational data of the first 20 elements. I have located some good periodic tables for you to study (B&W, Coloured, Pictorial, Chinese PT, Korean PT). I advise you print of one of these to either stick in your glossary, workbook or laminate, and also print one off for your wall of your study desk at home. We will be referring to this throughout the year, and it will be a helpful resource. I also recommend the website webelements as a starting point for research into the propoerties of any elements.

See you in class.

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26 Comments on “An Elemental Approach”

  1. Kern Says:

    Hi, is it cool with you if I use msn writing or does it have to be proper english.

  2. mrgrichting Says:

    Hi “Kern”,

    You can use msn, within reason! Just so long as I can read it. However, I would ask all students to identify themselves so that I know who is posting! (All you need to do is either use your school email address or use your First name and Surname initial)

    MrG

  3. Kern Says:

    A fun quiz to test your knowledge about the periodic table.

    I got 13/16 😉

    http://www.juliantrubin.com/quiz/periodictablequiz.html

  4. Kern Says:

    Hi all,

    Very funny article I came across.

    PS. Do not take any of it seriously 😀

    http://uncyclopedia.org/wiki/Periodic_table

  5. Henry Says:

    Hi Mr. G.
    I am in 10 D for this year and i had you for one lesson today.

    I dont think that I’m particularly good in my science but I think that you would be helping me learn a lot this year.

    See you in class MrG!

    Henry

  6. Henry Says:

    Wow I noticed you had a Korean PT.
    I’m from Korea.
    not so good with atoms or molecules both in Korean and English though.
    this has to be the last comment for tonight sir. better be off to sleep
    see you in class.

    Henry

  7. Kern Says:

    yo

    my names kern and im in your science classs

    Form:10D

    Kern

  8. Kern Says:

    Hi all,

    Musical humorist Tom Lehrer (1928-now) recited the name of all the chemical elements known at the time in his song “The Elements”(1959). Since then, 15 elements are discovered of which 9 are named, which are lawrencium(103), rutherfordium(104), dubnium(105), seaborgium(106), bohrium(107), hassium(108), meitnerium(109), darmstadtium(110), and roentgenium(111)(This was previously temporarily named unununium which is still in our periodic table). Note how all of the elements above are man-made.

    Here are some links if you’re interested. These are also my sources:

    Lyrics – http://www.privatehand.com/flash/elements_lyrics.pdf

    More about Tom Lehrer – http://www.tomlehrer.org/
    http://en.wikipedia.org/wiki/Tom_Lehrer

    Flash animation of the song – http://www.privatehand.com/flash/elements.html

    Kern

  9. Kern Says:

    Hi all,

    Amalgam is a soft metal which is made out of a mixture of a metal and mercury (the metal has to be non-soluble with mercury). Although most metals are soluble with mercury, some like iron are not.

    Amalgam is most commonly used as a silver tin or copper alloy in dentist fillings. They are used because they’re cheap,easy to use and more durable than many other options. Although they are regarded safe, this is not without controversy as even a minor exposure of mercury to the body can be fatal.

    Kern

  10. Kern Says:

    Hi all,

    Our human started making stone tools (lithics) thousands and thousands of years ago. The art of making stone tools was called “flintknapping” and they did this for many different reasons like hunting, cloth making, etc.

    For more information click on the link below.

    http://www.units.muohio.edu/dragonfly/tools/lithics.shtml

    Kern

  11. Stephen C Says:

    I tried the quiz that Kern posted but only got 12 😦

    Im also in 10D

  12. Stephen C Says:

    Oh and i can almost remember the first 20 elements but i can’t remember their atomic numbers

  13. mrgrichting Says:

    Hi Class,

    I tired the quiz that Kern posted – I got 16/16 – but I had to guess at two (so that’s 15/16 – half marks for guessing because I’m a teacher and should know better!). Can anyone beat me without cheating?

    MrG

  14. Stephen C Says:

    The second time i did it i got 15/16. I’m not sure if that counts though.

    Stephen

  15. Zhong Hao Gan Says:

    I got 14/16, the first 2 wrong and I guessed like a lot of it.

  16. Lawson C Says:

    Hi everyone
    Didn’t Mr. G say that the word for making stone in the Stone Age start with K?
    Also, I got 11/16 in the test
    Lawson C

  17. Kern Says:

    Hi all,

    Cool digging game i came across…

    http://www.miniclip.com/games/motherload/en/

  18. Kern Says:

    Hi class,

    Corrugated iron are iron sheets shaped into folds. It is usually used in building’s rooftops as it’s light, strong, corrosion resistant and can also be easily transported because of it’s properties.

    Source: http://en.wikipedia.org/wiki/Corrugated_iron

    Kern

  19. Kern Says:

    Hi class,

    If you’re having trouble with question 20 of excercise 1.1, here’s the formulae I figured out with an example…

    x+b*a=25

    Find an interval from the table in which 25 lies(in the stress row).
    40 and 50

    Find the difference between the stress of the intervals.
    32-5=27

    Take that answer and divide it by 10. make this a
    2.7

    Find the stress of your first number of the interval. make this b
    5

    The formulae with the substituted numbers will look like this x+5*2.7=25

    x=47.407

    Kern

  20. Lynette Says:

    “Hi all,”/”Hi class!”

    [Why are we greeting each other through blog comments?]

    I was always under the impression that corrugated iron was shaped the way it was to assist with drainage, but that now that I think about it, it’s unnecessary as the water would roll right off whether it were flat or corrugated. It’s clearly not for aesthetic reasons either because it’s UGLY, so it must be done for pragmatic reasons. Because we’re doing chemistry right now I assumed it would have something to do with chemical reactions. If it does, I wouldn’t have a clue because it seems to me that the corrugation makes it oxidise faster around the raised… wavy corrugated bits.

    😦
    idk

    Um… the only thing we (my dad and I – I went so far as to ask him :P) could think of was expansion and contraction. In hotter weather the metal sheets would expand, placing unnecessary pressure on the bolts holding it in place. In cold weather the reverse would occur and the metal would shrink, which would pull on the bolts. The shape of the indentation is such that it would allow for expansion and contraction – the extra slack between areas of fastening means that when the metal expands, the corrugated areas are pushed closer together and when it contracts, they are pulled further apart. So instead of it yanking on the bolts and screws of the roof of the house, it simply folds up closer together etc. Sort of like a concertina (sp?) folding thing.

    So that’s my very long winded explanation of a very simple concept that probably isn’t even correct. Yay!

    Lynette

  21. Lynette Says:

    YESSSS longest reply!! mwahahhaha

    I tried the quiz and got 14/16 – I didn’t know where the noble gases were located and didn’t know whether plutonium or uranium had the greater atomic number.

    (I also guessed the date of creation of the periodic table because I couldn’t remember it. Fail.)

  22. Kern Says:

    Hi all,

    Just add on from what I said before,

    Corrugated iron is used because it’s:

    An alloy – just by adding a little bit of carbon, the metal becomes an allow gets stronger and it’s bending strength also increases

    Corrosion resistant – By galvanising iron it is also gets protected from rust

    Can be easily transported – due to it’s shape and weight, it can be stacked and easily transported

  23. mrgrichting Says:

    Lynette,

    That was a great answer – while it’s not the answer I expected it shows a lot of thought and initiative. Good work!

    MrG.

  24. Lynette Says:

    Just because it’s corrugated doesn’t necessarily mean that it will be galvanised, right? I mean, sheet iron could just as easily be galvanised as if it were corrugated. Corrugation doesn’t affect the type of metal used – i.e. whether it’s an alloy or not (and most iron things do contain some amount of carbon.) I would argue that corrugated iron is easier to stack than sheet iron due to the awkwardness of shape, though the ripples in the iron might help to keep it in place. In short, I can’t think of a reason as to why corrugated iron is used more than iron that is completely flat – all the proposed reasons so far appear to be entirely circumstantial (galvanisation and carbon content don’t have anything to do with the shape of the iron.)

    Hm… stupid question, but is it something completely unrelated like “sheet iron reflects light more than corrugated iron and hurts people’s eyes more” ? (just a very bad example)

    Could you tell us the correct answer then?

  25. Lawson Says:

    Hi everyone
    I think corrugated iron is shaped like it is because it would be stronger than iron which is flat.
    Also, I think Lead (Pb) has 2 different electro valencies because of how the electrons are arranged in sub-shells. Silver is group 2 but has an electro valency of 4 because of the same theory as above.
    Lawson

  26. Lynette Says:

    whoops, I meant that corrugated iron would be more difficult, not less.

    Hi Lawson.


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