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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.