What does the element composition (evidence) of the Moon, Earth, and Mars suggest about the origin of the moon?

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

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.