Each of the following questions consists of two statements, I in the left-hand column and II in the right-hand column. For each question, determine whether statement I is true or false and whether statement II is true or false. Select the appropriate answer combination from the choices below. Choices with a filled CE oval denote that statement II is a correct explanation of the true statement I.
|Diamond has a high melting point||
||in a diamond crystal, the carbon atoms are held in place by ionic bonds.|
Select an Answer
It is true that diamond melts at a very high temperature (over ). Substances with ionic bonding do have high melting points, but the bonding in diamond is network covalent, not ionic. (Note that unless both statements are true, it is not necessary to determine whether the second statement is a correct explanation of the first statement.)