Multiple Choice
Which of the following is the atomic number of silicon (Si)?
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2. Atoms & Elements
Periodic Table: Element Symbols
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How many naturally occurring elements are found on the periodic table?
A
86
B
118
C
104
D
92
Verified step by step guidance1
Understand the question: It asks for the number of naturally occurring elements on the periodic table, not the total number of elements known or synthesized.
Recall that the periodic table currently contains 118 elements, but many of these are synthetic and created in laboratories.
Identify that naturally occurring elements are those found in nature without human intervention, typically up to uranium (element 92).
Recognize that elements beyond uranium (atomic number 92) are mostly synthetic and do not occur naturally in significant amounts.
Conclude that the number of naturally occurring elements is 92, corresponding to all elements from hydrogen (1) to uranium (92).
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