My Isotopes

What is isotopes????



Ramai pelajar yang selalu memberikan jawapan yang tidak tepat tentang isotope. contohnya seperti berikut :

i)     Isotope have same proton number but different nucleon number 
       ( mempunyai nombor proton yang sama tetapi nombor nukleon yang berbeza )
ii)    Isotope have same proton number but different number of neutron
       ( mempunyai nombor proton yang sama tetapi nombor neutron yang berbeza )

Kenapa jawapan di atas tidak tepat ???? Macam dah betul tapi kenapa tak dapat markah.....

Kata kunci paling penting adalah ATOM...Kerana satu perkataan markah hilang.  Tersangatlah rugi.
So be careful. Inilah jawapan yang tepat...

Isotopes are atoms that have the same number of protons but different number of neutrons

or
atoms that have the same proton number but different nucleon number.

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GUIDELINES ON ANSWERING QUESTIONS IN CHEMISTRY PAPER 2

GUIDELINES ON ANSWERING STRUCTURED QUESTION

1.  General

(a)    As with other subjects, you should read all questions carefully and circle all important key words.

(b)   Answers can be short but they must be precise and complete.

(c)    The space provided for your answer gives an indication as to ‘how long’ the answer should be.

(d)   Always look at the marks allotted for each question as a guide to how many points you should give. 

2.  Answers must be PRECISE.

  * Need not write in complete sentence but your answer must be PRECISE.

     Example:
     State the conversion of energy that occurs during the electrolysis.

     Answer:

    /  The energy conversion that occurs during electrolysis is from electrical energy to chemical energy.

     /  From electrical energy to chemical energy.

    X To chemical energy. [Answer incomplete. 0 mark!]