Multiple Choice
Which property is shared by all elements in period 3 of the periodic table?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
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Which of the following elements is a transition metal in period 4 of the periodic table?
A
K
B
Fe
C
Ca
D
Br
Verified step by step guidance1
Identify the period number given in the problem, which is period 4. This means we are looking at elements in the fourth row of the periodic table.
Recall the definition of transition metals: these are elements found in the d-block of the periodic table, typically groups 3 through 12, characterized by having partially filled d orbitals.
List the given elements and their positions: K (potassium) is in group 1, Ca (calcium) is in group 2, Fe (iron) is in group 8, and Br (bromine) is in group 17. All are in period 4.
Determine which of these elements fall into the d-block (transition metals). Since Fe is in group 8, it is a d-block element and thus a transition metal.
Conclude that Fe is the transition metal in period 4 among the given options because it has partially filled d orbitals, unlike K, Ca, and Br.
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