Relationships occur between the atomic number and melting or boiling points of elements. Beyond the first period on the table, the melting point of elements will increase until the midpoint of period, in which the melting points will begin to drop. In single rows of elements, the melting point generally increases as the atomic number increases in a set of elements.
an example:
Be 4 1551°K
Mg 12 922°K
Ca 20 1112°K
Sr 38 1042°K
Ba 56 1002°K
Ra 88 973°K
The relationship between atomic number and melting or boiling points has some exceptions both across a period and within a row. Transition metals do not follow melting point trends, with individual temperatures varying wildly. Gases do not have a melting point. In single columns, alkali metals and groups located around metalloids, the melting point decreases as the atomic number increases.
Mg 12 922°K
Ca 20 1112°K
Sr 38 1042°K
Ba 56 1002°K
Ra 88 973°K
The relationship between atomic number and melting or boiling points has some exceptions both across a period and within a row. Transition metals do not follow melting point trends, with individual temperatures varying wildly. Gases do not have a melting point. In single columns, alkali metals and groups located around metalloids, the melting point decreases as the atomic number increases.
