Which electron transition represents a gain of energy?

A. from 2nd to 3rd shell

B. from 2nd to 1st shell

C. from 3rd to 2nd shell

D. from 3rd to 1st shell

Potential energy Is energy of what

A gas occupies 11.2L at 0.860kPa. What is the pressure if the volume becomes 15.0L A) 0.64L B) 1.2kPa C) 0.64kPa D) 1.2L

How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3 (PO4) 2? A) one C) three B) two D) four

Consider the reaction cl2 (g) + i2 (g) 2 icl (g), which is endothermic as written. what would be the effect on the equilibrium position of removing cl2 (g) ? 1. reaction would go to the left, making more "reactants" 2.

What are two similarities between glucose and ATP

What is the general form for the simplest type of acid-base reaction?

Which element has a larger atomic radius than sulfur? chlorine cadmium fluorine oxygen

Which of the following procedures is used when refining petroleum? Increase the temperature of the oil. Decrease the temperature of the oil. Increase the pressure of the oil. Decrease the pressure of the oil.

What is the mass of calcium in 2.3•10^23 molecules of calcium phosphate

How many metaloides are found on the periodic table