NY Regents Chemistry Exam Jan 2023
6 Which phrase describes the crystal structure and properties of two different forms of solid carbon called diamond and graphite?
(1) same crystal structure and same properties
(2) same crystal structure and different proper- ties
(3) different crystal structures and different properties
(4) different crystal structures and same proper- ties
Solution: Diamond and graphite are both made from carbon. However, diamond is one of the strongest materials while graphite is the lead in our pencils (soft). Their difference in properties is due to the different arrangement of carbon atoms in their structure. Choice 3 is correct.