Which of the following metals has an electronic configuration 2, 8, 4?

Correct option is C

​The correct answer is (c) Si

Explanation:

• The element with the electronic configuration 2, 8, 4 is silicon, which is a metalloid.
• An element with the electronic configuration is 2, 8, 4 has electronegativity in between non-metal and metal. So it can be classified as a metalloid.

Information Booster: Metalloids are chemical elements that have properties of both metals and nonmetals. They have a variety of properties, including:

• Appearance: Metalloids are shiny and brittle, and are solid at room temperature.
• Electrical conductivity: Metalloids conduct electricity, but not as well as metals.
• Thermal conductivity: Metalloids conduct heat, but not as well as metals.
• Chemical reactions: Some metalloids, like boron, can act as both acids and bases in chemical reactions.
• Oxides: Metalloids form weakly acidic or amphoteric oxides.​​