Which of the following is most responsible for the success of modern day space missions?
invention of the telescope
acceptance of heliocentric theory
development of liquid propulsion systems
discovery of red shift by the hubble telescope

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘