WAEC - Chemistry (2024 - No. 42)
An atom of an element in the ground state contains 8 valence electrons. The element is considered as a
metal
semi-metal
noble gas
halogen
Explanation
An atom containing 8 valence electrons is typically classified as a noble gas. Noble gases are found in Group 0 of the periodic table and are known for their stability due to having full valence shells, which means they possess eight electrons in their outermost shell.