I need to know the definition of a cell

Consider the n = 3 energy level in a hydrogen atom. how many electrons can be placed in this level?

By studying a star's spectrum, scientists can work out its chemical make-up and temperature. What instrument do astronomers' use to carry out this task? A) space probe B) spectroscope C) radio telescope D) light telescope

What metric unit is used for measuring an eyelash?

Define the following words: - experiment - variable - independent variable - dependent variable - control variable - purpose

What does the arow mean in a chemical equation

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda

What substances decrease the h + ion concentration in a solution?

How much greater is the energy produced by a fusion reaction compared to a chemical reaction?

True or false. A bond between a metal atom and a nonmetal atom is likely an iconic bond

What is a precipitate? It is a liquid that forms from solution during a chemical reaction. It is a reactant that forms from solution during a chemical reaction. It is a solid that forms from solution during a chemical reaction.