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Question

Question
Lead has an atomic number of 82. Which statement describes all neutral atoms and ions of lead?(1 point)
Responses

Neutral atoms of lead must have 82 electrons. Ions must have 82 electrons, as well.
Neutral atoms of lead must have 82 electrons. Ions must have 82 electrons, as well.

Neutral atoms of lead must have 82 protons. Ions must have 82 protons, as well.
Neutral atoms of lead must have 82 protons. Ions must have 82 protons, as well.

Neutral atoms of lead must have 82 neutrons, but ions can have more or fewer.
Neutral atoms of lead must have 82 neutrons, but ions can have more or fewer.

Neutral atoms of lead must have 82 protons, but ions can have more or fewer.
Neutral atoms of lead must have 82 protons, but ions can have more or fewer.
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Answer 1

The correct statement that describes all neutral atoms and ions of lead is:

"Neutral atoms of lead must have 82 protons, but ions can have more or fewer."

Here's the reasoning:

• A neutral atom of lead has 82 protons (which is equal to its atomic number) and, to be neutral, it must also have 82 electrons.
• Ions, however, are charged species formed when an atom either loses or gains electrons. Therefore, lead ions can have fewer than 82 electrons (leading to a positive charge) or more than 82 electrons (leading to a negative charge). However, the number of protons (which defines the type of element) will always remain 82 for lead.

Neutrons can vary in number among different isotopes of lead, but the statement about protons correctly describes the distinction between neutral atoms and ions.