Which description best matches Rutherford's model of the atom? Group of answer choices
A The atoms is a positive sphere with negative electrons embedded in it.

B Electrons orbit the nucleus in set, circular orbits.

C The atoms has a tiny, massive nucleus at its center with electrons surrounding it

D The atoms is a solid, indivisible sphere

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.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

The same side of the moon always faces earth because the