Elements in which two groups are considered highly reactive? a.1 & 18(8A)
b.2 & 14 (4A)
c.3-12
d.1 & 17(7A)

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Which action would reduce the activation energy of a chemical reaction? a. adding a catalyst to the reaction b. adding more reactants to the reaction vessel c. lowering the potential energy of the products d. lowering the potential energy of the reactants e. raising the temperature of the reaction

Water molecules are polar with ends that exhibit partial positive and negative charges. such opposite charges make water molecules attract each other through which type of bonds?