Which of the following atoms has four valence electrons? (2 points) select one: a. beryllium (be) b. carbon (c) c. titanium (ti) d. potassium (k)

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.