By examining electron domain geometry, one can determine that the ammonia molecule (NH3) has
a. one sp2 orbital.
b. two sp2 orbitals.
c. three sp3 orbitals.
d. four sp3 orbitals.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

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Which electron configuration represents the electrons in an atom of sodium in the ground state at stp