객관식
Which two groups of elements in the periodic table are considered the most reactive?
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2. Atoms & Elements
Periodic Table: Group Names
객관식
Which statement best describes the noble gases?
A
They are generally unreactive due to having a complete valence electron shell.
B
They have high chemical reactivity and easily lose electrons.
C
They readily form compounds with alkali metals.
D
They are located in Group 2 of the periodic table.
검증된 단계별 안내1
Recall the position of noble gases in the periodic table: they are located in Group 18, not Group 2.
Understand the electron configuration of noble gases: they have a complete valence electron shell, which means their outermost energy level is full.
Recognize that having a complete valence shell makes atoms stable and less likely to react chemically with other elements.
Compare this stability to other groups: elements that easily lose electrons (like alkali metals) are highly reactive, unlike noble gases.
Conclude that the best description of noble gases is that they are generally unreactive due to having a complete valence electron shell.
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