Carbon-14 has a half-life of approximately 5,730 years. how many half-lives have occurred in a sample that contains 50 percent of the original amount of the parent isotope?

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

1. list three scientific reasons cockroaches may fly.

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∘