Multiple Choice
How many elements are present in period 6 of the periodic table?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
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Which element in period 4 of the periodic table is the most chemically active non-metal?
A
Ge
B
Br
C
Kr
D
Se
Verified step by step guidance1
Identify the elements listed in the problem and confirm that they belong to period 4 of the periodic table. The elements given are Ge (Germanium), Br (Bromine), Kr (Krypton), and Se (Selenium).
Recall that chemical activity for non-metals generally increases as you move from left to right across a period, reaching a maximum near the halogens, which are highly reactive non-metals.
Recognize that among the given elements, Br (Bromine) is a halogen, which are known to be the most chemically active non-metals in their respective periods.
Understand that Kr (Krypton) is a noble gas, which are generally inert and not chemically active, while Ge (Germanium) is a metalloid and Se (Selenium) is a non-metal but less reactive than halogens.
Conclude that Bromine (Br), being a halogen in period 4, is the most chemically active non-metal among the options provided.
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