what relationship exists between the atomic number of an element and the number of protons in a neutral atom of an element?​

Ways that industry and agriculture use physical properties to separate substances

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)