Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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Prepare for the Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science exam. Utilize flashcards and multiple-choice questions with hints and explanations to succeed in your certification.

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What information is provided by the atomic number of an element?

The number of neutrons in the nucleus
The number of protons in the nucleus
The total mass of the atom
The chemical reactivity of the element

The correct answer is: The number of protons in the nucleus

The atomic number of an element is defined as the number of protons present in the nucleus of an atom of that element. This fundamental property is crucial because it determines the identity of the element; for example, an element with an atomic number of 6 is carbon, while an element with an atomic number of 8 is oxygen. The atomic number also dictates the arrangement of electrons in an atom, influencing the chemical behavior and reactivity of the element. Each element has a unique atomic number, making it an essential characteristic in the organization of the periodic table.