Multiple Choice
Which term is used to describe the horizontal rows on the periodic table?
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2. Atoms & Elements
Periodic Table: Element Symbols
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How many elements on the periodic table are known to occur naturally on Earth?
A
104
B
86
C
118
D
92
Verified step by step guidance1
Understand the question: It asks for the number of elements on the periodic table that occur naturally on Earth, meaning elements that can be found in nature without human synthesis.
Recall that the periodic table currently has 118 confirmed elements, but not all of these are naturally occurring; many are synthetic and created in laboratories.
Identify the range of naturally occurring elements: Elements with atomic numbers 1 (Hydrogen) through 92 (Uranium) are known to occur naturally on Earth.
Recognize that elements beyond atomic number 92 are typically synthetic and do not occur naturally in significant amounts on Earth.
Therefore, the number of naturally occurring elements on Earth is 92.
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