Hi! Could someone help me figure out how to place vector arrows for each bond in an acetone structure? I gave as many points as I could:)

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Which of the following is a pure substance? airbloodcopperwood