Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)? (1 point)

Rubidium has more protons and fewer electrons than calcium.

Rubidium has fewer protons and more electrons than calcium.

Rubidium has more protons and more electrons than calcium.

Rubidium has fewer protons and fewer electrons than calcium.

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 words describe the reality that the universe looks the same from various perspective

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol