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The Atmosphere: Ionosphere
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Particles of gas, called ions, become electrically charged in the ionosphere. The ionosphere plays an important role in transmitting radio waves.

Subject:
Science
Provider:
Utah Education Network
Author:
Visual Learning Company
Date Added:
02/28/2010
Atoms: Atom gaining neutron
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The number of protons of an element is constant, but the number of neutrons can change. Isotopes are atoms of the same element with different numbers of neutrons.

Subject:
Science
Provider:
Utah Education Network
Author:
Visual Learning Company
Date Added:
02/28/2010
Atoms: Compound
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Compounds are formed by joining atoms of two or more elements. In this animation an ionic bond holds atoms together.

Subject:
Science
Provider:
Utah Education Network
Author:
Visual Learning Company
Date Added:
02/28/2010
Atoms: Examples of atoms
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The four atoms depicted here have a different atomic number, which refers to the number of protons in the nucleus. The atomic number of helium is 2, aluminum is 13, hydrogen is 1, and oxygen is 8.

Subject:
Science
Provider:
Utah Education Network
Author:
Visual Learning Company
Date Added:
02/28/2010