Which statement describes how an atom in the ground state becomes excited?
(1) the atom absorbs energy, and one or more electrons move to a higher electron shell.
(2) the atom absorbs energy, and one or more electrons move to a lower electron shell.
(3) the atom releases energy, and one or more electrons move to a higher electron shell.
(4) the atom releases energy, and one or more electrons move to a lower electron shell.

Select the correct answer. you have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. if the house circuit provides 120.0 volts, what is the current through this bulb?

How many molecules are found in 1.32 mol of nacl?

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next