Elemental Composition
Elements known to be present on the lunar surface include, among others, oxygen (O), silicon (Si), iron (Fe), magnesium (Mg), calcium (Ca), aluminium (Al), manganese (Mn) and titanium (Ti). Among the more abundant are oxygen, iron and silicon. The oxygen content is estimated at 45%. Carbon (C) and nitrogen (N) appear to be present only in trace quantities from deposition by solar wind.
Neutron spectrometry data from the Lunar Prospector indicate the presence of hydrogen (H) concentrated at the poles.
Read more about this topic: Geology Of The Moon
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