A scientist is conducting an experiment to determine the melting point of a substance. They find that the melting point is about 160 0C higher than they expected based on the size and molecular mass of the compound. What would explain their results? Select all correct answers.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

answer///carbon;