The bohr model of an atom shows a nucleus with electrons circling around it. what does the bohr model show that makes it a useful model for understanding atoms?

differences in sizes of electrons and protons
distances of the electrons from the nucleus
number of electrons in each orbital
paths of the electrons around the nucleus

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

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?

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