Multiple Choice
What are the columns in the periodic table called?
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2. Atoms & Elements
Periodic Table: Group Names
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Which group of elements is extremely reactive and reacts strongly with water?
A
Alkaline earth metals (Group 2)
B
Halogens (Group 17)
C
Alkali metals (Group 1)
D
Noble gases (Group 18)
Verified step by step guidance1
Identify the groups of elements mentioned: Alkaline earth metals (Group 2), Halogens (Group 17), Alkali metals (Group 1), and Noble gases (Group 18).
Recall the general chemical properties of each group, focusing on their reactivity with water.
Understand that Alkali metals (Group 1) have a single electron in their outermost shell, which they readily lose to form positive ions, making them highly reactive, especially with water.
Recognize that when Alkali metals react with water, they form hydroxides and release hydrogen gas, often vigorously or even explosively.
Conclude that among the groups listed, Alkali metals are the most reactive with water due to their electronic configuration and tendency to lose their outer electron easily.
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