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Multiple Choice
Which characteristic is shared by all elements in the same period of the periodic table?
A
They have the same number of electron shells.
B
They have similar chemical properties.
C
They have the same atomic radius.
D
They have the same number of valence electrons.
Verified step by step guidance
1
Understand that the periodic table is arranged in rows called periods and columns called groups or families.
Recall that elements in the same period have their electrons filling the same principal energy level or electron shell.
Recognize that as you move across a period from left to right, the number of protons and electrons increases, but the number of electron shells remains constant.
Note that elements in the same period do not necessarily have similar chemical properties or the same number of valence electrons, as these characteristics are more closely related to groups (columns).
Conclude that the shared characteristic of all elements in the same period is that they have the same number of electron shells.