editing disabled


Chapter 6

Doug Brown

ü Element name - Hydrogen
ü Element symbol- H
ü Atomic number- 1
ü Atomic mass (not rounded)- 1.00794 amu

Atomic Structure
ü Number of protons within the nucleus- 1
ü Number of electrons within the neutral atom- 1
ü Most common isotope (in the proper notation)- 1H
ü Number of neutrons within the nucleus of the most common isotope-1

ü Scientist(s) who discovered (or made) the element- Robert Boyle produced hydrogen gas as early as 1671 while experimenting with iron and acids. Henry Cavendish first recognized hydrogen as a distinct element in 1766.
ü Year it was discovered (or made)-
ü Origin of the name- From the Greek words hydro and genes, which together mean "water forming."
ü 2 most common uses- 1) raw fuel that most starts burn to produce energy. 2) Can combine with oxygen to form water

Physical Properties
ü State of matter at room temperature- Gas
ü Melting point (in °C)- -259.34°C
ü Boiling point (in °C)- -252.87°C
ü Density- 0.00008988 grams per cubic centimeter
ü Abundance in earth’s crust- 1.40×103 milligrams per kilogram

Chemical Properties
ü Other elements that will react with your element- oxygen, Chlorine, Nitrogen, Carbon
ü Compounds that contain your element- H2O, NH3, CH4, C12H22O11
ü Short paragraph (about 5-7 sentences) about an important use of your element or one of its compounds in some detail
Hydrogen is composed of a single proton and a single electron, hydrogen is the simplest and most abundant element in the universe. It is estimated that 90% of the visible universe is made up of hydrogen. Hydrogen is the raw fuel that most stars burn to produce energy. The same process is being studied as a possible power source for use on earth. The sun's supply of hydrogen is expected to last another 5 billion years. Huge amounts of hydrogen are combined with nitrogen from the air to produce ammonia. Hydrogen is also added to fats and oils, such as peanut oil, through a process called hydrogenation. Liquid hydrogen when combined with liquid oxygen makes an very good rocket fuel. Hydrogen combines with other elements to form numerous compounds. Some of the common ones are: water (H2O), ammonia (NH3), methane (CH4), table sugar (C12H22O11), hydrogen peroxide (H2O2) and hydrochloric acid (HCl). Hydrogen has three common isotopes.

ü Bohr model
ü chem 1.png
ü Lewis dot structure
ü chem pic 2.png