Multiple Choice
In atomic structure, what determines the identity of an element?
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4. Atoms and Elements
The Atom (Simplified)
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In atomic structure, what does the atomic number of an element represent?
A
The number of neutrons in the nucleus
B
The total number of protons and neutrons in the nucleus
C
The number of electrons an atom gains or loses when forming ions
D
The number of protons in the nucleus
Verified step by step guidance1
Understand that the atomic number is a fundamental property of an element that helps identify it uniquely.
Recall that atoms consist of protons, neutrons, and electrons, where protons and neutrons are in the nucleus, and electrons orbit around it.
Recognize that the atomic number specifically counts the number of protons in the nucleus of an atom.
Note that the number of protons determines the element's identity and its position on the periodic table.
Distinguish the atomic number from other quantities: the number of neutrons, the total number of protons and neutrons (mass number), and the electrons gained or lost during ion formation.
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