The atom of an element X combines with aluminium (13AI)?

Assessment: WAEC SSCE - Chemistry - 2001 (Objective) Subject: Chemistry

Question 1 Report

The atom of an element X combines with aluminium (13AI)?
Answer Details
The correct answer is AI 2X 3. This is because when the atom of an element X combines with aluminium (13AI), it forms an ionic compound. The formula for ionic compounds is determined by balancing the charges of the ions involved. Aluminium has a charge of 3+ while the atom of element X has a charge of 2-. To balance the charges, two atoms of element X are required for every three aluminium atoms. The resulting formula for the compound is AI 2X 3.
Read lesson note on Structure Of The Atom (Ghana Only) (WAEC)
Read lesson note on Atomic Structure And Bonding (JAMB)
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