How many electrons does oxygen have in its 2nd energy level?

Which is a characteristic of mixtures?

Mitosis is a type of cell division that produces cells that are identical to the parent cell. meiosis is a different type of cell division that produces cells that carry have a genetic material of the parent cell. based on the information provided how do the purpose of mitosis and meiosis differ

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?