What is point group of allene?

Allene (1,2-propadiene) has point group D2d, itself is achiral because it has two planes of symmetry. ... An allene with substituents on one terminal carbon atom are unlike and substituent on other terminal carbon atoms are same, allene will be achiral. It will have one symmetry plane.

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by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.