Essay --

Boiling point, similarly to melting point, depends on the strength of forces between the particles that make up the element. When a substance boils, most of the remaining attraction forces are broken, the particles can then move freely and farther apart. The stronger that the attraction force is the more energy that is needed to overcome them and increase the boiling point. Boiling points vary in a regular way or pattern depending on their position in the periodic table. The general periodic trend is that the boiling point increases to the middle of the d block, and then decrease to the Noble Gases. The highest melting point is apparent in the middle of the transition metals because of the electron – electron repulsion. This is due to the fact that the transition metals have metallic bonding, which is a very strong bond; therefore a lot of energy is required to break them. Due to a lot of energy being needed, the boiling point is then higher.. The smallest amount of electron à ¢â‚¬â€œ electron repulsion can be found in the middle of block d. This repulsion causes the element to be less stable, thus allowing it be easier to break apart, which then results in a lower boiling point. Boiling points generally increase going from sodium to aluminum, then decrease to argon, with a minor bump at Sulfur. There is no simple way to identify the trend for boiling points when going down a column. Some groups increase when going down a column, while some decrease, and others have no trend. This is because boiling point increase when electron – electron repulsion decreases. Since electron – electron repulsion decreases going down columns on the periodic table, it can be expected that the boiling point would increase, which does not always occur. This in... ...itrogen? Than Bromine? Why Is Hydrogen so Weird? :. N.p., n.d. Web. 16 Jan. 2014. "Atomic and Ionic Radius." Atomic and Ionic Radius. N.p., n.d. Web. 16 Jan. 2014. "Atomic Radius of the Elements." Atomic Radius for All the Elements in the Periodic Table. N.p., n.d. Web. 14 Jan. 2014. "Chemical Elements Listed by Density." The Chemical Elements of the Periodic Table Sorted by Density. N.p., n.d. Web. 16 Jan. 2014. "Chemistry Lesson 1 Instruction, Page 5." Chemistry Lesson 1 Instruction, Page 5. N.p., n.d. Web. 15 Jan. 2014. "Electronegativity." Electronegativity. N.p., n.d. Web. 13 Jan. 2014. "Ionization Energy and Electron Affinity." Ionization Energy and Electron Affinity. N.p., n.d. Web. 13 Jan. 2014. "Periodic Table Trends." Periodic Table Trends. N.p., n.d. Web. 12 Jan. 2014. "Seaborgium." WebElements Periodic Table of the Elements. N.p., n.d. Web. 16 Jan. 2014.