A metal's luster is due to . A. the free flow of electrons between its atoms
B. Light energy being absorbed and given off again by its valence electrons.
C. Energy from the nuclei of its atoms being given off as a visible light
D. Valence electrons giving off energy as they collide with one another.

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged