The reactivity of an element is based on it's a) protons b) neutrons

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

How is the ideal mechanical advantage of a wheel and axle calculated?