Which element has a lower electronegativity Potassium Aluminum Or Chlorine

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.

The independent variable in an experiment will be the variable that you o a) change ob) hold constant ng c) observe for changes

What is the force of an object when it landed(sitting in the ground)