Fluorine and Chlorine are very reactive elements. Which prediction best explains this phenomena? A. Both elements are stable atoms. B. Both elements form a +1 ions. C. Both elements are metalloids. D. Both elements only need one more valence electron to fill their outer shell.

To a of 4 x hz is 1. 0. mm nm nm

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.