Multiple Choice
Which characteristic is shared by all elements in group 18 (8A) of the periodic table?
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2. Atoms & Elements
Periodic Table: Group Names
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Which characteristic is commonly shared by elements within the same group on the periodic table?
A
They have identical atomic masses.
B
They have similar chemical properties due to the same number of valence electrons.
C
They are all metals.
D
They have the same atomic number.
Verified step by step guidance1
Understand that the periodic table is arranged in groups (columns) and periods (rows), where elements in the same group share certain characteristics.
Recall that elements in the same group have the same number of valence electrons, which are the electrons in the outermost shell of an atom.
Recognize that the number of valence electrons largely determines an element's chemical properties, such as how it reacts with other substances.
Note that atomic mass and atomic number vary as you move down a group, so elements in the same group do not have identical atomic masses or atomic numbers.
Conclude that the common characteristic shared by elements within the same group is that they have similar chemical properties due to having the same number of valence electrons.
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