Which one of the following elements is a non-metal but is lustrous?

The correct answer is Iodine.

• Iodine is a chemical element. The body needs iodine but cannot make it.
• The iodine needed by the body must come from the diet. As a rule, there is very little iodine in food, unless it has been added during processing.
• Processed food typically contains more iodine due to the addition of iodized salt.
• Symbol: I
• Atomic mass: 126.90447 u
• Atomic number: 53
• Electron configuration: [Kr] 4d105s25p5
• Electronegativity: 2.66
• Van der Waals radius: 198 pm
• Uses of iodine:
  • ​Promoting thyroid health.
  • Reducing risk for some goiters.
  • Managing overactive thyroid gland.
  • Treating thyroid cancer.
  • Neurodevelopment during pregnancy.

Additional Information

• Silicon:

• Germanium:

• Carbon: