An Aug. 11 article about meteorites incorrectly...

THE BALTIMORE SUN

An Aug. 11 article about meteorites incorrectly described isotopes of nitrogen and hydrogen. An atom of nitrogen 14 contains 7 protons and 7 neutrons. Nitrogen 15 has 7 protons and 8 neutrons. A hydrogen atom has no neutrons. Its isotope deuterium has one.

The Sun regrets the error.

Pub Date: 8/21/96

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