Question

Which of the following metals can be cut with a knife?
1. Aluminum
2. Platinum
3. Copper
4. Sodium

Answer 1

Correct Answer - Option 4 : Sodium

The correct answer is Sodium.

• Sodium metal can be cut with a knife.
  • Sodium is silver-white color metal with malleable and ductile properties.
  • It is a metal that can easily be cut with a knife.
  • It is a good conductor of heat and electricity.

• Sodium and potassium can be cut with a knife.
  • Sodium is a chemical element with the symbol Na and atomic number 11.
  • It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table.
  • Its only stable isotope is ²³Na.
  • The free metal does not occur in nature and must be prepared from compounds.

• Aluminum:
  • Symbol: Al
  • Atomic mass: 26.981539 u
  • Atomic number: 13
• Platinum
  • Symbol: Pt
  • Atomic mass: 195.084 u
  • Atomic number: 78
• Copper
  • Symbol: Cu
  • Atomic mass: 63.546 u
  • Atomic number: 29