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what is nitrogen? Nitrogen is a chemical element with the symbol “N” and atomic number 7. It is a nonmetal and an essential building block of life on Earth. Nitrogen is the most abundant gas in Earth’s atmosphere, making up about 78% of the air we breathe. In its most common form, nitrogen exists as … Read more

What is hydrogen? Hydrogen is the lightest and most abundant chemical element in the universe. It is represented by the symbol “H” on the periodic table and has an atomic number of 1, which means it has a single proton in its nucleus. Hydrogen is the primary building block of the universe and plays a … Read more

What is oxygen? Oxygen is a chemical element and one of the fundamental building blocks of life on Earth. It is represented by the symbol “O” on the periodic table and has the atomic number 8. Oxygen is an essential element for the survival of most organisms, including animals, plants, and microorganisms. In its natural … Read more