An electron in an atom moves from the ground state to an excited state when the energy of the electron

(1) decreases

(2) increases

(3) remains the same

What does a process require to be spontaneous at all temperatures? Answer a catalyst and lower activation energy positive enthalpy and negative entropy changes a heat source and high activation energy negative enthalpy and positive entropy changes

Which molecules do not attract each other? Your answer: Non-polar and non-polar molecules Polar and non-polar molecules Positve parts of polar molecules and positive non-polar molecules Positive parts of polar molecules and negative parts of

As the pressure of a gas at a fixed temperature increases the volume will

For multiple covalent bonds to form in molecules the molecules must contain carbon nitrogen or

AlCl₃ What are the valencies of AlCl³?

Which state of matter isn't typically found on earth?

Both black and white road surfaces absorb sunlight. the warmer road surface at the end of a sunny day is the

Which information in the periodic table indicates the number of protons in an atom? A. the position of the element in its column B. the element's chemical symbol C. the element's atomic mass D. the element's atomic number

What were the expected results of Rutherford's gold foil experiment, based on Thomson's model of the atom? How did the real results of the gold foil experiment change the accepted model of the atom?

How many neutrons are in titanium