How many elements occur naturally?

Correct option is C

The correct answer is (C) 94.

• 94 of these 118 elements are found naturally on Earth.
• Six of these are found in extremely small amounts: technetium (atomic number 43), promethium (atomic number 61), astatine (atomic number 85), francium (atomic number 87), neptunium (atomic number 93), and plutonium (atomic number 94).
• These 94 elements have been discovered throughout the universe, in the spectra of stars and supernovae, when short-lived radioactive elements are created.
• The first 94 elements have been found directly on Earth as primordial nuclides present from the birth of the Solar System, or as fission or transmutation products of uranium and thorium.
• The atomic numbers 1 through 82 of the 94 naturally occurring elements each have at least one stable isotope (except for technetium, element 43, and promethium, element 61, which have no stable isotopes).