What is the most abundant element in the atmosphere?

What are the two most abundant elements by mass in the earth's crust, oceans, and atmosphere? Does this make sense? Why?

What are the four most abundant elements by mass in the human body? Does this make sense? Why?

What is the most abundant element for Earth as a whole?

Spell out the full name of the element.

The four most abundant elements by mass in the human body are oxygen, carbon, hydrogen, and nitrogen. These four elements make up about 96% of the human body. The next four most abundant elements are calcium, phosphorus, magnesium, and potassium. Write the expected ground-state electron configuration and valence shell orbital diagram for these eight most abundant elements in the human body