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Why diamond is so hard?
the diamond is very hard because it has crystallized at depth of 140-150 km( sometime it has crystallized at 300-400 km) into the earth to high pressure ranging approcimately betwen 45-60 kilobars and low temperature ranging approximately betwen 1652-2372 F(900-1300 C).AnswerIts hard because it consists of very small atoms (carbon) that are then tightly packed together and linked via covalent bonds (bonds where two atoms share an electron). It is the combination of very tight packing and very tight linking that results in diamond being so hard.
High melting point in functional group?
Functional groups tend to have polar atoms in them. With that said this means that they from very strong bonds with other atoms because of electronegativity. It's hard to break those bonds without a large input of energy. That is why polar functional groups have high melting points
Do hydrogen bonds make water hard to boil?
yes
How does solid differ from from a liquid?
Solids have a shape and a typical structure.
How are the carbon atoms arranged in graphite?
The atoms are bonded together in a rigid network which makes diamond very hard. Each carbon atom forms 4 covalent bonds
Why is a compound so hard to break?
Sometimes the bonds are strong. On the other hand, however, nitroglycerin is notorious for having breakable bonds. There is a class of compounds called "nonexistent". Their bonds break quickly.
What is responsible for diamond's hardness?
Diamond is a structure known as a giant covalent network, formed from carbon. Each carbon is bonded to four others in a tetrahedral arrangement. Due to the atoms' size and the length of the bonds, this results in an extremely strong linkage, one which requires enormous amounts of energy to break or to deform. Because of this fact, diamond is both extremely hard (difficult, in fact nigh impossible to alter the shape of) and extremely difficult to break (not easy to destroy bonds).
Do covalent bonds have melting points?
Particles bond to achieve a stable electronic configuration, such as the octet structure. A covalent bond is when 2 atoms (usually non-metals) share electrons with each other such that both atoms can get to gain the negative charge of 1 or more electrons. Such bonds are hard to break because they are very strong. Hence, molecules with covalent bonds are hard to melt.
How are hydrogen bonds different from covalent bonds?
Hydrogen Bonds can be broken easy, Covalent Bonds are hard to break apart, but both are needed to hold different parts of DNA strands together
Is silicon hard?
yes, it is bonded in a giant covalent lattice and has a tetrahedral structure, and is very hard to break apart
Why is diamond such a hard ad nonreactive substance?
Carbon atoms can bond to other carbon atoms in a variety of ways, but when they bond in a network, with all the atoms bonding to all the other atoms that surround them, it is a very strong bond, stronger than the bonds formed in other minerals. Strong bonds are, by definition, hard to break. Hence the material is very hard. Scratching it requires breaking bonds.
How hard is it to break your jaw?
Not very hard, depends on your bone structure. Some can be broken with a soft blow and some need to be hit very hard.
Why does copper have a high melting point linked by structure?
This is because copper is held together by a sea of negative delocalised electrons which hold the positive copper ions in place. These bonds are very hard to break, meaning the metal has a high melting point...
Are ionic bonds hard to break?
Yes, and when they are it will result in a massive release of energy. That is what's happening in nuclear fission and atomic bombs.
Does zinc conduct electricity when solid?
yes it does, zinc is an ionic structure so it will be hard to xbreak the bonds so it would have a high melting point but it will conduct electricity because it will goe through the bonds but keep them intacked.
What is required to break a chemical bonds?
When the atoms rearrange and they hit each other hard enough to form a bond.
Why are the melting and boiling points of quartz very high?
Silicon dioxide * has a high melting point - varying depending on what the particular structure is (remember that the structure given is only one of three possible structures), but around 1700°C. Very strong silicon-oxygen covalent bonds have to be broken throughout the structure before melting occurs. * is hard. This is due to the need to break the very strong covalent bonds. * doesn't conduct electricity. There aren't any delocalised electrons. All the electrons are held tightly between the atoms, and aren't free to move. * is insoluble in water and organic solvents. There are no possible attractions which could occur between solvent molecules and the silicon or oxygen atoms which could overcome the covalent bonds in the giant structure. Giant covalent structures are arranged in a continuous lattice. This structure is very strong because of the strong forces between the molecules. http://www.chemguide.co.uk/atoms/structures/giantcov.html
