The approximate composition of the atmosphere is shown in the pie-chart. which statement best describes the chart?
a) the chart shows the percentages of elements in a mixture.
b) the chart shows the percentages of elements in a compound.
c) the chart shows the percentages of pure substances in a mixture.
d) the chart shows the percentages of compounds in a pure substance

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

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.

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion