According to the collision theory, what two factors must be true for a given collision to successfully create products?

Identify the electromagnets with poles that are reversed from the electromagnet shown above

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

How much energy is required to vaporize 2 kg of copper? a 4730 kj b 207kj c 9460 kj d 414kj