The electron configuration of an element is shown below. 1s22s22p5

Name the group this element belongs to in the periodic table and explain your answer.

Based on the electron configuration, explain how many electrons it is likely to receive from the atom of another element during the formation of a bond.

Melting increases as mass increases. since alkanes are not branched molecular structures, the one with the heavier mass will have higher melting point.  octane's mp > butane's mp

Firstly, the planetary model of the atom  failed  to explain why individual atoms produce discrete  line spectra. in fact, according to rutherford's model, each individual atom should produce a  continuous  line spectrum. the second flaw to his model was the fact that electrons orbit the nucleus in a circular fashion.

Boiling is the right answer