Multiple Choice
Which of the following pairs of elements exhibits the most striking difference in their chemical properties due to their classification on the periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
Multiple Choice
In the periodic table, each electron energy level is represented by a different:
A
family
B
block
C
period
D
group
Verified step by step guidance1
Understand that the periodic table is organized in rows and columns, where each row corresponds to an electron energy level or shell.
Recall that the rows in the periodic table are called 'periods', and each period represents a principal energy level (n) where electrons reside.
Recognize that 'groups' are the columns representing elements with similar chemical properties and the same number of valence electrons, but not energy levels.
Know that 'blocks' refer to the type of atomic orbital (s, p, d, f) being filled with electrons, not the energy level itself.
Conclude that the correct term for electron energy levels represented in the periodic table is 'period', as each period corresponds to a different principal energy level.
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