![]() How do atoms make compounds? Typically they join together in such a way that they lose their identities as elements and adopt a new identity as a compound. ![]() Silicon dioxide and boron nitride have some similarities, but neither of them comes close to the ultimate hardness of diamond. There are other substances that have similar bonding arrangements as diamond does. Not only does a person have to break many connections at once, but also the bonds are strong connections from the start. ![]() There are stronger interactions known, but the carbon-carbon connection is fairly strong itself. Breaking a diamond means breaking every bond at once.Īlso, the bonds are moderately strong. This three-dimensional array of connections extends throughout the diamond crystal, making it essentially one large molecule. Four is the greatest number of bonds that is commonly made by atoms, so C atoms maximize their interactions with other atoms. In a perfect diamond crystal, each C atom makes four connections-bonds-to four other C atoms in a three-dimensional matrix. What is special about this element that makes diamond so hard? Diamond is the hardest natural material known on Earth.
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