Multiple Choice
Which element in period 4 of the periodic table is the most chemically active non-metal?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
Multiple Choice
Which best describes the sequence of the elements in period 5 of the periodic table?
A
It begins with an alkali metal and proceeds through alkaline earth metals, transition metals, metalloids, and ends with a noble gas.
B
It starts with a transition metal and ends with a halogen.
C
It consists entirely of nonmetals.
D
It contains only representative elements and no transition metals.
Verified step by step guidance1
Recall that a period in the periodic table is a horizontal row of elements, and period 5 specifically contains elements with atomic numbers from 37 (Rubidium) to 54 (Xenon).
Identify the types of elements in period 5 by their groups: it starts with group 1 (alkali metals), followed by group 2 (alkaline earth metals), then the transition metals (groups 3 to 12), metalloids, and ends with the noble gases (group 18).
Understand that period 5 includes a variety of element types: metals (alkali, alkaline earth, and transition metals), metalloids, and nonmetals, showing a progression across the period.
Recognize that the sequence does not start with transition metals nor does it consist entirely of nonmetals; it also includes transition metals, so it is not limited to only representative elements.
Conclude that the best description of the sequence in period 5 is that it begins with an alkali metal, proceeds through alkaline earth metals, transition metals, metalloids, and ends with a noble gas.
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