Multiple Choice
Which factor primarily determines the chemical properties (reactivity and bonding behavior) of an atom?
3. Matter and Energy
Chemical Properties
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Which of the following elements is generally considered the least chemically reactive under standard conditions?
A
Neon (Ne)
B
Sodium (Na)
C
Chlorine (Cl)
D
Fluorine (F)
Verified step by step guidance1
Understand that chemical reactivity refers to how readily an element undergoes chemical reactions under standard conditions.
Recall that elements in the noble gas group, such as Neon (Ne), have a full valence electron shell, making them very stable and generally unreactive.
Compare the given elements: Sodium (Na) is an alkali metal known for high reactivity, especially with water; Chlorine (Cl) and Fluorine (F) are halogens, which are highly reactive nonmetals.
Recognize that Neon (Ne), being a noble gas with a complete octet, does not tend to form chemical bonds easily and is therefore the least reactive among the options.
Conclude that Neon (Ne) is the least chemically reactive element under standard conditions due to its stable electron configuration.
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