Question

After reviewing your answers to questions 2 and 4 above, would you define boiling point and melting point as a periodic table family trend (vertical groups), period trend (horizontal rows), or neither? Explain your answer

Answer 1

Neither, boiling and melting point per element varies from element to element on the periodic table. Family trends and period trends determine what kind of element each aspect is. 

Answer 2

Answer:

Neither of them.

Explanation:

Hello,

Let me exemplify this with the following group II metals' melting points because we can not figure out a specific increasing or decreasing direction:

Be -> 1551K , Mg -> 922K , Ca -> 1112K , Sr -> 1042K , Ba -> 1002K , Ra -> 973K

In such a way, since gases such as nitrogen, oxygen, fluorine and others don't have meting point and transition metals do not have a specific trend for the melting point, we state that melting point is not eligible as periodic or group trend.

Then, some boiling points are: N -> 77.5K, O -> 90.33K and F -> 85.1K demonstrate that boiling point can not be stated as a group trend. On the other hand, by considering F-> 85.1K, Cl -> 239.25K and Br -> 332.4K which are all halogens, there is an apparent increasing trend by moving downwards along the groups but it is unproved as long as for alkalies K -> 1032K and Cs -> 944K and Cs is underneath K.

Best regards.