A noble gas used in advertising signs because it glows when electrified is?

A noble gas used in advertising signs because it glows when electrified is?

• A. Ammonium
• B. Uranium
• C. DDT
• D. Neon

Answer: (D)

Neon is the gas used in advertising signs because it glows when electricity passes through it. Neon is a noble gas, which means it's very stable and stays as a separate gas inside a sealed tube. When a high voltage energizes the gas, electrons collide with neon atoms and excite them to higher energy levels. As the atoms relax back down, they emit light at specific wavelengths, producing a bright glow. Neon signs are famous for their distinctive red-orange color, though other noble gases can create different colors. The other options aren’t noble gases and don’t produce this glowing glow in signage.

Neon is the gas used in advertising signs because it glows when electricity passes through it. Neon is a noble gas, which means it's very stable and stays as a separate gas inside a sealed tube. When a high voltage energizes the gas, electrons collide with neon atoms and excite them to higher energy levels. As the atoms relax back down, they emit light at specific wavelengths, producing a bright glow. Neon signs are famous for their distinctive red-orange color, though other noble gases can create different colors. The other options aren’t noble gases and don’t produce this glowing glow in signage.