I have a project and I need help with a diagram. What do the moon, sun, and earth look like at night in the Americas? (diagram)

What neutral atom is isoelectronic to mn+4

What layer of the atmosphere is directly above the troposphere?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.