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Which element has protons in its nucleus?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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Which element has an atomic number of (i.e., contains protons in its nucleus)?
A
Neon (Ne)
B
Magnesium (Mg)
C
Aluminum (Al)
D
Sodium (Na)
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Understand that the atomic number of an element represents the number of protons in the nucleus of its atoms.
Recall that each element on the periodic table is uniquely identified by its atomic number.
Look up the element with atomic number 11 on the periodic table, which corresponds to the number of protons.
Identify that the element with atomic number 11 is Sodium (Na).
Confirm that Neon (Ne), Magnesium (Mg), and Aluminum (Al) have atomic numbers 10, 12, and 13 respectively, so they do not match the atomic number 11.
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