Geography, 20.01.2020 17:31 naocarolina6

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3. why do the terrestrial planets lack hydrogen and helium in their atmospheres?
o a. hydrogen and helium were converted to other compounds as the planets formed.
b. hydrogen and helium are present in rings around the terrestrial planets.
c. hydrogen and helium were blown away by solar wind.
d. hydrogen and helium can't be retained because the planet masses are too small,
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3. why do the terrestrial planets lack hydrogen and h...