Chemistry
WAEC 2025
Alkali metals are good conductors of heat and electricity because they
-
A.
contain delocalised electrons
-
B.
are found in the d-block
-
C.
have vibrating ions
-
D.
are all metals
Correct Answer: Option A
Explanation
Alkali metals (Group 1 elements) have a single valence electron in their outermost shell. In a metallic lattice, these valence electrons are weakly held by the nucleus and become delocalised, meaning they are free to move throughout the entire structure.
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