Biology: Essential Elements in Organisms
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Questions and Answers

Name the four most abundant elements in living organisms.

Carbon, Hydrogen, Oxygen, Nitrogen

What percentage of human body mass is Carbon?

18%

What percentage of human body mass is Hydrogen?

9%

What percentage of human body mass is Oxygen?

<p>65%</p> Signup and view all the answers

What percentage of human body mass is Nitrogen?

<p>3%</p> Signup and view all the answers

What percentage of atoms in the human body is Carbon?

<p>9.5%</p> Signup and view all the answers

What percentage of atoms in the human body is Hydrogen?

<p>63.0%</p> Signup and view all the answers

What percentage of atoms in the human body is Oxygen?

<p>25.5%</p> Signup and view all the answers

What percentage of atoms in the human body is Nitrogen?

<p>1.4%</p> Signup and view all the answers

Carbon classifies under which category?

<p>Most common elements</p> Signup and view all the answers

Hydrogen classifies under which category?

<p>Most common elements</p> Signup and view all the answers

Oxygen classifies under which category?

<p>Most common elements</p> Signup and view all the answers

Nitrogen classifies under which category?

<p>Most common elements</p> Signup and view all the answers

Calcium classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Chlorine classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Magnesium classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Phosphorus classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Potassium classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Sodium classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Sulfur classifies under which category?

<p>Mineral elements</p> Signup and view all the answers

Boron classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Chromium classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Cobalt classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Copper classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Fluorine classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Iodine classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Iron classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Manganese classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Molybdenum classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Selenium classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Silicon classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Tin classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Vanadium classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Zinc classifies under which category?

<p>Trace elements</p> Signup and view all the answers

Mineral elements carry how much % of body mass?

<p>Less than 1%</p> Signup and view all the answers

Trace elements carry how much % of body mass?

<p>Less than 0.01%</p> Signup and view all the answers

Most common elements carry how much % of body mass?

<p>Approximately 95%</p> Signup and view all the answers

Study Notes

Essential Elements in Living Organisms

  • Four most abundant elements in living organisms: Carbon, Hydrogen, Oxygen, Nitrogen.
  • Carbon constitutes 18% of human body mass.
  • Hydrogen accounts for 9% of human body mass.
  • Oxygen is the most abundant, making up 65% of human body mass.
  • Nitrogen comprises 3% of human body mass.

Distribution of Atoms in the Human Body

  • Carbon represents 9.5% of total atoms in the human body.
  • Hydrogen dominates with 63.0% of total atoms.
  • Oxygen accounts for 25.5% of the atoms.
  • Nitrogen contributes 1.4% to the atomic composition.

Classification of Common Elements

  • Carbon, Hydrogen, Oxygen, and Nitrogen are classified as the most common elements.
  • Calcium, Chlorine, Magnesium, Phosphorus, Potassium, Sodium, and Sulfur are categorized as mineral elements.

Trace Elements

  • Minor components in biology include Boron, Chromium, Cobalt, Copper, Fluorine, Iodine, Iron, Manganese, Molybdenum, Selenium, Silicon, Tin, Vanadium, and Zinc, all classified as trace elements.

Body Mass Contribution

  • Mineral elements contribute less than 1% to total body mass.
  • Trace elements constitute even less, less than 0.01% of body mass.
  • The most common elements together account for approximately 95% of the human body's mass.

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Description

Explore the essential elements that make up living organisms, focusing on the most abundant elements in the human body. This quiz covers their distribution, classification, and significance. Test your knowledge on the vital atoms required for life!

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