The diagram presents the structures of five substances, A, B, C, D and E.
A: a ring made up only of sulfur atoms linked by single covalent bonds.
B: a molecule in which sulfur is bonded to two hydrogen atoms.
C: a structure with two carbon atoms joined together, hydrogen atoms attached, and a sulfur atom bonded to hydrogen.
D: a molecule showing sulfur double-bonded to two oxygen atoms.
E: a molecule in which two sulfur atoms are bonded together, with each sulfur also bonded to a chlorine atom.
Use only the structures shown in the diagram to answer the questions below. Each structure may be chosen once, more than once or not at all.
(a(i))[1]
Which of A, B, C, D or E is an element?
(a(ii))[1]
Which of A, B, C, D or E has a structure similar to ethanol?
(a(iii))[1]
Which of A, B, C, D or E is a compound that contributes to acid rain?
(a(iv))[1]
Which of A, B, C, D or E has double covalent bonds?
(a(v))[1]
Which of A, B, C, D or E contains halogen atoms?
(b)[3]
Structure A is a non-metal. State three usual differences between metals and non-metals.
(c)[1]
What does the term compound mean?