Which pair of atoms can form an ionic bond with each other? A. Potassium (K) and Fluroine (F)

B. Sodium (Na) and potassium (K)

C. Flurine (F) and Ch

D. Sodium (Na) and Neon (Ne)

Heat by radiation will most likely be transferred through a.gas b.liquid c.solid d.insulator

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.

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.