Alkali metals are good conductors of heat and electricity because they

Chemistry

WAEC 2025

A. contain delocalised electrons
B. are found in the d-block
C. have vibrating ions
D. are all metals

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

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.

Previous Next

Go back to Chem classroom

Report an Error Ask A Question Download App