form three chemistry =]
Plz help me ..
I don't know how to do it ..
hand in the work 25/5 .. plz ~~
here is the question .. thx ^^
1. The following table gives some information about W,X,Y and Z which represent particles of some elements. These particles are either atoms or ions.
Number of
Particle Mass number Atomic number protons electrons neutrons
W 14 7 7 7 7
X 19 9 9 9 10
Y 19 9 9 10 10
Z 39 19 19 19 20
a) W exists as diatomic molecules. Draw an electron diagram for its molecule, showing electrons in the outermost shells only.
b) i) What is the relationship between X and Y ?
ii) Suggest a chemical reaction in which X can change into Y.
c) X can form a compound with Z.
i) Draw an electron diagram for the compound.
ii) Calculate the formula mass of the compound.
plz help me ~~~~~~~~~~~~ thx >vvvvvvvvvvvv<
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