Which of the answer choices best completes the analogy?

photon energy level
atomic fingerprint
electron energy level
atomic orbital

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants