Which of the following elements has the highest atomic number?

Correct option is B

The correct answer is (b) Gold.

• The atomic number of an element represents the number of protons in its nucleus. Among the given options, gold (Au) has the highest atomic number, which is 79.
  

Information about other options:

•  Copper (Cu): Atomic number 29
• Silver (Ag): Atomic number 47
• Iron (Fe): Atomic number 26
  

Information Booster:

•  Gold is a precious metal known for its high density, malleability, and conductivity.
•  Gold, silver, and copper belong to the same group (Group 11) in the periodic table, commonly known as coinage metals due to their historical use in making coins.
• The relationship between mass number (A), atomic number (Z), and the number of neutrons (N) can be expressed with the formula: A=Z+N.
• The number of Protons in an atom is equal to its Atomic Number (Z).