What is the purpose of a spectroscope? * A. to spread light into different wavelengths
B. to study a star's composition
C. to study a star's temperature
D. all of the above

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Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons