What does an atomic number represent in an atom? 1. Number of protons 2. Number of electrons. 3. Number of neutrons. 4. Number of protrond and neutrons

Whats the chemical formula for dilute hydroxide acid

Why do planets in our solar system stay in their positions A) The sun's gravity keeps them in place. B) The sun's radiation keeps them there. C) Friction with the atmosphere keeps them from escaping. D) They travel the same distance from each other.

What is the relationship between the kinetic energy of molecules in a solid and a liquid? Use two complete sentences.

What is required for a chemical reaction to occur?

What is the best way to reduce the activation energy?

Conversion. 5 km to inches

How many kilojouls are required at 0c to melt an ice cube with a mass of 25g

Which substance is the oxidizing agent in this reaction? 2CuO+C→2Cu+CO2 Express your answer as a chemical formula.

Why does the light bulbs have to be part of the loop in order for it to be succesful?

Which best describes the transition from gas to liquid? Energy must be removed because particles in liquid move more slowly. Energy must be added because particles in liquid move more quickly.