The electron configuration for chromium is 1s22s22p63s23p63d54s1 instead of 1s22s22p63s23p63d44s1. the configuration is an exception to the pauli exclusion principle heisenberg uncertainty principle aufbau principle schrödinger equation

The correct answer is Aufbau principle.

Explanation:

Pauli exclusion principle states that no two electrons with in an atom can have all four quantum numbers same.

Heisenberg principle states that it is impossible to measure with high precision the value of momentum and position of an electron.

Aufbau principle states that the electron will occupy the lowest energy level first before occupying the higher energy levels.

Schrodinger equation is used to find the allowed energy levels of quantum mechanical systems of an electron.

Chromium is the 24th element of the periodic table and its electronic configuration must be written as:

But the actual configuration for this is

This configuration is an exception to Aufbau's principle because half filled sub-levels is more stable than other configurations.

The actual configuration has half filled 'd' and 's' sub-levels but the expected configuration had fully filled 's' orbital and partially filled 'd' orbital.

Thus, actual configuration is accepted for chromium atom.

Hence, the correct answer is Aufbau's principle.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;