Which of the below is an example of a chemical that plants, algae, and animals all need to survive and grow? carbon dioxide

oxygen

sunlight

(This is 7th grade science)

Hydrogen has only one electron in its only (and outer) electron shell. if a hydrogen atom were to absorb a small amount of energy, where would bohr say the electron would go? a. fly off the atom b. nowhere, it would just speed up. c. spiral inwards towards the nucleus d. move up to another shell that would form