객관식
Which element has 17 protons in its nucleus?
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4. Atoms and Elements
Periodic Table: Element Symbols
Multiple Choice
Which element has more protons: tin or iodine?
A
Not enough information; proton number depends on the isotope
B
They have the same number of protons
C
Iodine
D
Tin
검증된 단계별 안내1
Recall that the number of protons in an element is defined by its atomic number, which is unique to each element and does not depend on the isotope.
Look up the atomic number of tin (Sn) on the periodic table. This number represents the number of protons in tin atoms.
Look up the atomic number of iodine (I) on the periodic table. This number represents the number of protons in iodine atoms.
Compare the atomic numbers of tin and iodine to determine which element has more protons.
Conclude that the element with the higher atomic number has more protons, regardless of isotopes.
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