Free Air Force Lab Report

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COMPOSITION OF POLLUTION - FREE GROUND LEVEL AIR Nitrogen 78.08% Oxygen 20.95% Carbon Dioxide 0.03% COMPOSITION OF UNIVERSE COMPOSITION OF EARTH Hydrogen 60.40% Iron 35.4% Helium 36.56% Oxygen 27.8% Oxygen 0.96% Magnesium 17.0% Carbon 0.30% Silicon 12.6% ELEMENTS 90 Naturally occurring 19 Synthesized 109 TOTAL ATOM Chapter 3 What is it? Def: The smallest particle still having the characteristics of an element. It is made up of smaller particles: electrons, protons, and neutrons. Simplest atom is H (hydrogen). electron…show more content…
IONS When an atom does not have the same number of electrons and protons, it has a charge. This is an ion. If an ion had 11 protons and 10 electrons, it would be a positive ion. These are called cations. What element has 11 protons? If an ion had 17 protons and 18 electrons, it would be a negative ion. These are called anions. What element has 17 protons? Atoms and Ions Atoms have no net charge. They are neutral. Ions have a charge, either positive or negative. A positive ion has more protons than electrons. CATION A negative ion has more electrons than protons.

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