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N12/12/24 12/7 10 Silicon carbide, SiC, has a structure similar to diamond. Boron nitride, BN, has a structure similar to graphite. Bronze is an alloy of copper and tin. Which statements about SiC, BN and bronze are correct? 1 All are bonded covalently. 2 All except silicon carbide conduct electricity when solid 3 All have high melting points. 42​