객관식
Which neutral element has 18 electrons?
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9. Electrons in Atoms and the Periodic Table
Electronic Structure: Number of Electrons
Multiple Choice
Electronic Structure: Number of Electrons — How many electrons are in a neutral atom of tin (Sn)?
A
118
B
48
C
52
D
50
검증된 단계별 안내1
Identify the atomic number of tin (Sn) from the periodic table. The atomic number represents the number of protons in the nucleus of an atom.
Recall that in a neutral atom, the number of electrons is equal to the number of protons to balance the positive charge.
Use the atomic number of tin as the number of electrons in a neutral atom of tin.
Write the relationship as an equation: \(\text{Number of electrons} = \text{Atomic number of Sn}\).
Conclude that the number of electrons in a neutral tin atom is equal to its atomic number, which you can find on the periodic table.
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