a) Draw a structural formula of a sulfur oxide in which sulfur uses all of its valence electrons to form bonds.

b) Draw the structural formula of a sulfur compound with fluorine in which sulfur uses all of its valence electrons to form bonds.

c) Draw the structural formula of a phosphorus compound with chlorine in which chlorine uses all of its unpaired electrons to form bonds.

d) Write the formula of a copper oxide in which copper is an ion that has given away all electrons of its outer shell (you may type the answer here in the response box).

Carry out all drawing (and writing) tasks on paper and, after writing your name and surname, hand them to the teacher.