this isn't a question
No. Carbon, nitrogen, and oxygen are separate elements.
Carbon dioxide is chemical compound. Oxygen and nitrogen are chemical elements.
No, carbon and oxygen are not the only elements that can combine with nitrogen. Nitrogen can also form compounds with hydrogen, sulfur, and other elements to create a variety of nitrogen-containing compounds.
Hydrogen and Nitrogen. Or oxygen and carbon dioxide, or carbon monoxide.
Carbon dioxide, carbon monoxide, hydrogen.
Carbon, hydrogen, and oxygen
The four most abundant gases in Earth's atmosphere are nitrogen, oxygen, argon, and carbon dioxide. Nitrogen makes up about 78% of the atmosphere, oxygen around 21%, argon about 0.9%, and carbon dioxide less than 0.04%.
All proteins contain carbon, hydrogen, oxygen and nitrogen. Most of them also contain sulfur, which is found in the standard amino acid residues cysteine and methionine (any given protein might not contain either of these, though it would be unusual).
The most abundant elements in the universe, in order from most to least abundant, are Hydrogen, Helium, Oxygen, Carbon, and Nitrogen. Therefore, the correct list would start with Hydrogen, followed by Helium (not listed), then Oxygen, Carbon, and finally Nitrogen. The first option you provided, "Hydrogen Oxygen Nitrogen Carbon," is almost correct but is missing Helium and has an incorrect order for Nitrogen and Carbon.
The human body is made up of only mostly carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus. The top four elements are oxygen, carbon, hydrogen and nitrogen, so that would be a. on your list.
These elements are: oxygen, carbon, hydrogen, nitrogen, phosphorus.
No. Sugars are composed of carbon, hydrogen, and oxygen, but not nitrogen.