An atom of any element must contain "<span>(2) an equal number of protons and electrons" but it should be noted that atoms can borrow electrons from one another. </span>
NO alkenes can not react with potassium dichromate
Boiling water results in no chemical change. If water is just heated to its boiling temperature then there is a physical change.
Because they believed that heavenly bodies’ circular motions where caused by their being attached to unseen resolving solid spheres
