Multiple Choice
Which group of elements in the periodic table contains the noble gases?
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2. Atoms & Elements
Periodic Table: Group Names
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Which principle did Mendeleev use to organize elements into groups in his periodic table?
A
He grouped elements based on similar chemical properties.
B
He grouped elements according to their atomic number.
C
He grouped elements based on their density.
D
He grouped elements by their physical state at room temperature.
Verified step by step guidance1
Understand that Dmitri Mendeleev created the first widely recognized periodic table before the discovery of the atomic number.
Recognize that Mendeleev arranged elements primarily by increasing atomic mass, but more importantly, he grouped elements that exhibited similar chemical properties together in columns (groups).
Know that Mendeleev's key insight was to prioritize chemical properties over physical properties or atomic number, which was not yet known at his time.
Recall that Mendeleev left gaps in his table for undiscovered elements, predicting their properties based on the trends in chemical behavior within groups.
Conclude that the principle Mendeleev used to organize elements into groups was grouping elements based on similar chemical properties.
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