The Common Elements Notebook Page 27: http://www.classzone.com/vpg_ebooks/ml_sci_gr8/accessibility/ml_sci_gr8/page_340.pdf

Elements There are 118* different elements! Around 100 occur naturally.

Living Things 25 elements are found in living things. Most living things are made of these 6: Oxygen Carbon Hydrogen Nitrogen Calcium Phosphorus Totals 98.8% Oxygen (65%) Carbon (18.5%) Hydrogen (9.5%) Nitrogen (3.3%) Calcium (1.5%) Phosphorus (1.0%) K 0.4% S 0.3% Source: http://www.biologycorner.com/worksheets/elements.html

Nonliving Things Earth’s crust is mainly made of 8 elements: Oxygen Silicon Aluminum Iron Calcium Sodium Potassium Magnesium The sun (and the universe) is largely made of just 2 elements: Hydrogen Helium Oxygen 46.6 Silicon 27.7 Aluminum 8.1 Iron 5.0 Calcium 3.6 Sodium 2.8 Potassium 2.6 Magnesium 2.1 Other 1.5 Sources: same as next, plus http://education.jlab.org/glossary/abund_ele.html

Element Percent in Universe Percent in Earth Percent in Human Body Hydrogen 91 0.14 9.5 Helium 9 Trace Carbon 0.02 0.03 18.5 Nitrogen 0.04 3.3 Oxygen 0.06 47 65 Sodium 2.8 0.2 Magnesium 2.1 0.1 Phosphorus 0.07 1 Sulfur 0.3 Chlorine 0.01 Potassium 2.6 0.4 Calcium 3.6 1.5 Iron 5 Source: http://hyperphysics.phy-astr.gsu.edu/hbase/tables/elabund.html