Look at the location of elements A,B,C,and D in the following periodic table.Consider the oxides that form when the elements A-D are in their highest oxidation states.
-Which oxide has the lowest melting point?
A)A
B)B
C)C

Question

Look at the location of elements A,B,C,and D in the following periodic table.Consider the oxides that form when the elements A-D are in their highest oxidation states. 
-Which oxide has the lowest melting point?
A)A 
B)B 
C)C

Quizplus · Accepted Answer

Element C (sulfur) is a nonmetal and when it reacts with oxygen, it forms an oxide with a low melting point (SO2, sulfur dioxide). In contrast, elements A (potassium), B (magnesium), and D (silicon) are metals or metalloids and form oxides with higher melting points. For example, the oxide of element D (silicon dioxide) has a very high melting point and is commonly found in the form of quartz. Therefore, C (SO2) is the best choice for the oxide with the lowest melting point.

Look at the Location of Elements A,B,C,and D in the Following