Chemistry: Atomic Structure Quiz

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Questions and Answers

What does the atomic number indicate about an atom?

  • What the atom is (correct)
  • The number of electrons in the atom
  • The number of neutrons in the atom
  • The mass of the atom in atomic mass units

The atomic number is equivalent to which of the following?

  • The number of protons (correct)
  • The mass number
  • The number of neutrons
  • The number of electrons

What occurs if the number of protons in an atom changes?

  • The atom becomes a different element (correct)
  • The atom's electrons increase
  • The mass number remains unchanged
  • The atom becomes an isotope

If a sodium atom maintains its identity, how many protons does it have?

<p>11 (B)</p> Signup and view all the answers

What defines an ion?

<p>An atom with a different number of protons and electrons (D)</p> Signup and view all the answers

Flashcards

Atomic Number

The number of protons in an atom's nucleus. It defines the element.

Proton

A positively charged particle found in the nucleus of an atom.

Ion

An atom with a different number of protons and electrons, resulting in a net electrical charge.

Mass Number

The sum of protons and neutrons in an atom's nucleus.

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Neutron

A neutral particle found in the atom's nucleus.

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