Multiple Choice
Who is credited with creating the first widely recognized periodic table by arranging elements according to their properties?
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2. Atoms & Elements
Periodic Table: Classifications
Multiple Choice
Which of the following best describes the difference between a period and a group on the periodic table of elements?
A
A period is a vertical column of elements, while a group is a horizontal row of elements.
B
A period is a horizontal row of elements, while a group is a vertical column of elements.
C
A period contains only metals, while a group contains only nonmetals.
D
A period contains elements with similar chemical properties, while a group contains elements with increasing atomic number.
Verified step by step guidance1
Understand the layout of the periodic table: it is organized in rows and columns.
Recognize that a 'period' refers to a horizontal row of elements across the periodic table.
Know that a 'group' refers to a vertical column of elements down the periodic table.
Recall that elements in the same group share similar chemical properties due to having the same number of valence electrons.
Note that periods represent elements with increasing atomic number from left to right, but do not necessarily share similar chemical properties.
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