Multiple Choice
Which alkaline earth metal has the largest atomic radius?
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9. Electrons in Atoms and the Periodic Table
Periodic Trend: Atomic Radius (Simplified)
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The modern periodic table is primarily arranged in order of increasing which property?
A
Atomic number (number of protons)
B
Number of neutrons
C
Atomic mass (average mass of the atom)
D
Atomic radius (size of the atom)
Verified step by step guidance1
Understand that the modern periodic table is organized to reflect the properties of elements in a systematic way.
Recall that the atomic number represents the number of protons in an atom's nucleus, which uniquely identifies each element.
Recognize that arranging elements by increasing atomic number places them in order of increasing number of protons, which determines their chemical behavior.
Note that earlier versions of the periodic table were arranged by atomic mass, but this caused inconsistencies in element placement.
Conclude that the modern periodic table is primarily arranged in order of increasing atomic number, not by number of neutrons, atomic mass, or atomic radius.
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