Halley's Comet Returns About Every ______________ Years

question 112

Short Answer

Halley's Comet returns about every ______________ years.

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Definitions:

Radium

Radium is a naturally occurring radioactive metallic element, used in cancer treatment and previously in luminescent paint for watches and instruments.

Electrons

Subatomic particles with a negative charge, found orbiting the nucleus of an atom.

Neutral Atoms

Atoms that have an equal number of protons and electrons, resulting in no overall charge.

Gain Or Loss

A financial term indicating the positive or negative difference between the value of something at two different times.