The last subshell of alkaline earth metals is:
Correct answer: A. 2s
- A. 2s
- B. 1s
- C. 2d
- D. 3d
Explanation
OPTION A: Group 2 is alkaline metals. Alkaline earth metals have two electrons in their valence shell and the last electron enters the s-subshell.OPTION B: The last subshell of alkaline earth metals is not 1s. This subshell is occupied by one electron in hydrogen.OPTION C: The last subshell of alkaline earth metals is not 2d. This subshell is occupied by a few electrons in transition metals.OPTION D: The last subshell of alkaline earth metals is also not 3d. This subshell is occupied by a few electrons in transition elements.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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