Answer:
C. 8A
Step-by-step explanation:
- Elements in the periodic table are classified as either metal, non-metals or metalloids.
- Metals are elements in the periodic table that are characterized by being good conductors of heat and electricity.
- Additionally, they react by forming cations to attain an octet configuration.
- Examples are elements in groups 1A. 2A, 3A and transition metals.
- Non-metals are elements that react by forming anions to attain an octet configuration.
- They are characterized by being poor conductors of heat and electricity and mostly exist as gases or liquids.
- Examples are elements in group 6A, 7A, and 8A.
- However, group 6A contains non-metals and a metal element polonium, unlike group 8A which only contains non-metals.
- Metalloids, on the other hand, are elements that have both the characteristics of metals and non-metals.