What is the electron configuration of an element with atomic number 20?

What is the pH of a solution of NaCl that has [H+] = 1.00 * 10-7 M

Most elements will have the same number as what?

Which equation represents the total ionic equation for the reaction of HNO3 and NaOH? OH + OH - > H2O HNO3 + NaOH → NaNO3 + H2O OH + NO3 + Na * + OH - - Nat + NO3 + H2O OH + NO3 + OH - - NO3 + H2O

Which of these reactions are redox reactions? Check all that apply. Cd + HCl → CdCl2 + H2 CuCl2 + Na2S → 2NaCl + CuS CaCO3 → CaO + CO2 2ZnS + 3O2 → 2ZnO + 2SO2 CH4 + 2O2 → CO2 + 2H2O

This massive shift in the crust of the earth is a result of plate tectonics What is it?

What minerals that are heavy, durable, and chemically resistant are likely to be found in what kind of deposites?

You have arrived on a planet where S2, not O2, is the gas used as fuel in combustion reactions. When gaseous propane (C3H8) is burned in S2, H2S and carbon disulfide gases are produced. If 200.0 grams of propane and 75.

What are not chemical properties of matter?!

Calculate the mass of water produced when 2.06 g of butane reacts with excess oxygen.

What describes color and streak?