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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What happens when fluorine becomes an ion

At a particular temperature, a 3.0 - L flask contains 2.4 mol Cl2,. 1.0 mol NOCl, and 4.5 x 10-3 mol NO. Calculate K at this. temperature for the following reaction:. 2NOCl (g) ↔ 2NO (g) + Cl2 (g)

How to balance the chemical equation of Al (S) + CuO (S) >Al2O3 (S) + Cu (S)

Calculate the temperature required to make a 75.8 ml ballon initially at 57.9c change its value to 50.8ml

Spray of small droplets in a gas is called

Calculate the acid dissociation constant of a weak monoprotic acid if a 0.5M solution of this acid gives a hydrogen-ion concentration of 0.000 1M? Show your work.

Which orbital notation represents a noble gas in the ground state

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.