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Elements of Living Organisms

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Questions and Answers

What percentage of elements in living organisms is composed of oxygen?

65% (correct)

21%

46%

78%

What is the term for the number of protons in an atom?

Atomic Mass

Atomic Number (correct)

Mass Number

Proton Mass

What is the result of a dehydration synthesis reaction?

The breakdown of H2O

The formation of H2O (correct)

The exchange of electrons

The release of energy

What is the approximate percentage of hydrogen in living organisms?

10% Signup and view all the answers

Why do cells not collide with each other?

Because they are negatively charged Signup and view all the answers

What is the term for atoms that have the same number of electrons and protons?

Neutral Atoms Signup and view all the answers

What is the main difference between biological macromolecules and other molecules?

They contain carbon and hydrogen Signup and view all the answers

What is the purpose of the periodic table?

To organize elements according to their shared chemical and physical properties Signup and view all the answers

What is the approximate percentage of carbon in living organisms?

18% Signup and view all the answers

What is the term for the process of emitting neutrons, protons, and electrons to achieve a more stable atomic configuration?

Radioisotopes Signup and view all the answers