Gold (Au) is considered a(n)

Compound

Potatoes

Mixture

Element

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

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from