Who was the first person to propose that atoms existed?

When comparing the two elements Br and Ga, the larger element is GaG a When comparing the two elements Br and Ga, the larger element is blank based on periodic trends alone. True or false?

What is the oxidation state of each element in FeBr2?

If you are using the unit Kelvin, you are measuring the average of which of these choices? A. kinetic energy of molecules. B. rate of reaction of particles. C. mass of ionic compounds. D. volume of a sample of gas.

A 4.00-gram sample of sodium chloride was added to a beaker containing 40.0 mL 0.033 M lead (II) nitrate solution. Lead (II) chloride was precipitated according to the following reaction.

Water has a specific heat of 4.186 J/g° c. How much heat is required to increase 10.0g of water from 25.0°C to 30.0°C?

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?

When a radioactive decay occurs what is released? A. Only protons and neutrons B. Only electrons C. Protons/Neutrons, beta particle, gamma ray D. Only gamma rays

How is the process of scientific inquiry and the design process similar and how they are different.

Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.