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Chemistry Help HERE ONLY !!
unknown 101:
--- Quote from: Nanavel on May 30, 2009, 03:04:16 pm ---Questions :
1) wha are the 2 uses of the 5 halogen atoms ??
2) explain by giving its structure why diamond is so hard ?? [4]
3) explain the structure of Diamond ??
4) describe the structure of germanium ?
--- End quote ---
1) used to make PVC (chlorine) , used in toothpaste(flourine)
2) because each carbon atom is covalentley bonded to 4 other carbons forming a tetrahedral giant macromolecule
3) same as 2
4) same as carbon ( but the answer depends on the question)
godfather93:
the 2 uses of the 5 halogen atoms - that's a strange question. sorry, dunno the answer
diamond is so hard because the atoms are tightly held together in a tetrahedral structure. the inter molecular forces (van der waal's forces) is very very strong, hence it is so hard and rigid. the atoms are not arranged in layers, so it cannot slip over each other.
the structure of germanium is very similar to that of carbon (tetrahedral)
unknown 101:
--- Quote from: godfather93 on May 30, 2009, 03:10:19 pm ---the 2 uses of the 5 halogen atoms - that's a strange question. sorry, dunno the answer
diamond is so hard because the atoms are tightly held together in a tetrahedral structure. the inter molecular forces (van der waal's forces) is very very strong, hence it is so hard and rigid. the atoms are not arranged in layers, so it cannot slip over each other.
the structure of germanium is very similar to that of carbon (tetrahedral)
--- End quote ---
the structure of germanium is similar to that of carbon, but it depends on the context of the question, right?
Nanavel:
ehhh ..
what about silicon does it has anything to do with Diamond ??
in question 1 >> i mean to say that Give 2 uses for each halogon atom ? like : a question came in the year 1996 that give 2 uses of Bromine and Iodine ?
so it thought it is better to know 2 uses for each halogen atoms .
unknown 101:
--- Quote from: Nanavel on May 30, 2009, 03:17:57 pm ---ehhh ..
what about silicon does it has anything to do with Diamond ??
in question 1 >> i mean to say that Give 2 uses for each halogon atom ? like : a question came in the year 1996 that give 2 uses of Bromine and Iodine ?
so it thought it is better to know 2 uses for each halogen atoms .
--- End quote ---
you dont have to know 2 uses for each halogen
and for silicon its usually in the from silicon dioxide(silica)
then u have to say, each silicon atom is covalentley bonded to four oxygen atoms, forming a tetrahedral giant macromolecule
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