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19th Apr 2000, 01:37 AM
I've got a chem thing to do and I can;t seem to understand some of the stuff below. If you're capable. Help.

Does the formation of an ionic compound between the atoms of two elements involve the ionisation of the atoms of some elements? Or, does it involve he sharing of pairs of electrons between atoms?

The structure of solid calcium chloride is best described as:
a) dicrete molecules of calcium chloride with strong bonding within the molecule but weak bonding between molecules
b) an infinite lattice in which calcium and chloride are linked by strong covalent bonds

The property of metals which enables them to conduct an electric current is that:
a) metal atoms are better suited as charged carriers than non-metal atoms
b) ions in the metal are able to move freely through the metallic lattice.

Mind Maps/Mnemonics Matter!

19th Apr 2000, 08:17 AM
U could be in luck! I did chemistry in higher and some of this stuff looks familiar (the solid calcium chloride stuff) so perhaps I will dig some of my old notes out and check them (when I have time) OK?

"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when
a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair."

19th Apr 2000, 12:23 PM
Right, here goes:
<LI>The formation of an ionic compound involves the ionisation of both elements. The atoms of the element with the strongest "pull" will tear away one or more of the other's electrons.
<LI>B. the calcium and chloride atoms form an ionroster (I don't know if that's the correct Dutch -&gt; English translation). Hmmm... lattice. /~unreal/ubb/html/smile.gif
<LI>B. That's why there called free electrons. (Again, I'm not sure about the translation.)

Note: It's been six years since I did my chemistry exams, so I'm kinda rusty on the subject. I am pretty sure these are the right answers, though.

http://members.spree.com/technology/azmo/smileys/disgust.gif Shouldn't you be figuring this out yourself? /~unreal/ubb/html/smile.gif