When electrons are filling energy levels, the lowest energy sublevels are

occupied first. This is

A. None of these

B. The Aufbau principle

C. Hund's rule

D. Conservation of energy

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The Bohr atomic model suggests that: The atom is made mostly of space. Electrons randomly orbit the nucleus. Protons and neutrons occupy energy shells. Gamma rays can can be used to split atoms.

How many grams are 3.01 * 1023 molecules of CuSO4?

In physical changes, the atoms or molecules that compose the matter do not change their identity, even though the matter may change its appearance. a. True b. False

Round to 3 significant figures. 1.4593

What is the percent by weight of sodium in sodium sulfate (Na2SO4) ? (The molar mass of Na = 22.99, S = 32.07, and O = 16.00.) 16.18% 22.58% 32.37% 45.05% 51.17%

How is the mole similar to a dozen?

What element with the highest electronegativity value? Cesium calcium helium fluorine

How many neutrons and electrons are in Oxygen⁻¹⁷ isotope?

What is science all about?

What type of change is a substance that changes form but remains the same?