The columns in the periodic table are also called a. sets. b. periods. c. families. d. energy levels

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion