Early Earth was constantly being bombarded by meteorites, comets, and asteroids.
Was early Earth an open system or a closed system?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

What human activity increases beach erosion?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2