When electricity is added to water, water breaks down and becomes hydrogen gas and oxygen gas. this is a chemical change because

a.

energy has been added.

b.

a liquid has become a gas.

c.

hydrogen and oxygen are chemicals.

d.

water has changed its identity

Motivation cannot be developed with practice; a person either possesses it or they do not.

Compare and contrast the bohr model and the electron cloud models of the atom.

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive