GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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oxygen, carbon, hydrogen and nitrogen
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carbon, hydrogen, nitrogen and helium
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hydrogen, nitrogen, magnesium and zinc
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oxygen, zinc, magnesium and lithium
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Detailed explanation-1: -By mass, about 96 percent of our bodies are made of four key elements: oxygen (65 percent), carbon (18.5 percent), hydrogen (9.5 percent) and nitrogen (3.3 percent).
Detailed explanation-2: -The elements-Oxygen, Carbon, Hydrogen and Nitrogen account for 96.2% of your body weight.
Detailed explanation-3: -Some elements are much more common than others. The human body is approximately 99% comprised of just six elements: Oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. Another five elements make up about 0.85% of the remaining mass: sulfur, potassium, sodium, chlorine, and magnesium.
Detailed explanation-4: -These four elements-oxygen, carbon, hydrogen, and nitrogen-together make up more than 95 percent of the mass of the human body, and the body cannot make elements, so it is helpful to have them in consumables.
Detailed explanation-5: -The elements that make up about 96% of the body weight are carbon, hydrogen, oxygen and nitrogen.