Hydrogen

=﻿HYDROGEN! ﻿ ﻿HYDROGEN IS ITS OWN FAMILY! (: = __INTERESTING INFO ABOUT HYDROGEN:__
 * symbol - H Hydrogen is a Greek word! HYDROGEN was discovered in 1776 by Cavendish!
 * atomic number - 1 [[image:http://www.green-planet-solar-energy.com/images/hydrogen_1.gif width="499" height="463" align="right"]]
 * atomic mass - 1.0079
 * protons - 1
 * neutrons - 0
 * electrons - 1
 * melting point - -259.34 C
 * boiling point - -252.87 C
 * normal phase - gas
 * cost - $1.40 for 1 pound
 * hydrogen is estimated to make up more than 90% of all atoms!
 * hydrogen is found in stars!
 * it plays an important part in the proton-proton reaction and carbon-nitrogen cycle.
 * this is how hyrogen is prepared:
 * steam on heated carbon
 * decomposition of certain hydrocarbons with heat
 * reaction with sodium or pottassium hydroxide on alumium
 * electrolysis of water
 * displacement of acids by certain metals
 * hydrogen is the primary component of jupiter!
 * it's found in living plants, petroleum, and coal!
 * hydrogen is the lightest of all the gases!
 * it combines with other elements to form compounds!