Structures

1

Ionic substances conduct electricity when molten or aqueous. Which of these statements correctly explains why?

2

Which of these substances has a molecular covalent structure?

3

Which of the following statements about molecular covalent substances is true?

4

What is an allotrope?

5

In diamond, each carbon atom is joined to how many other carbon atoms?

6

Why can graphite conduct electricity?

7

What is the meaning of the term malleable?

8

Substance X has a high melting and boiling point, doesn’t conduct electricity when solid but does conduct electricity when molten and is soluble in water. What structure does substance X have?