The maximum number of electrons that can occupy a specific energy level can be found using the following formula: Electron Capacity = 2 n 2 The variable n represents the Principal Quantum Number, the number of the energy level in question.
Atoms must have equal numbers of protons and electrons. In our example, an atom of krypton must contain 36 electrons since it contains 36 protons. Electrons are arranged around atoms in a special way.
Explanation: The mantle rock is solid and denser because it is cooler. This means it will sink closer to lower mantle as warmer, lense dense rock/magma moves upwards.