Multiple Choice
Which of the following elements has a two-letter symbol on the periodic table?
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2. Atoms & Elements
Periodic Table: Element Symbols
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Which of the following is a two-letter chemical symbol for an element on the periodic table?
A
Na
B
C
C
K
D
O
Verified step by step guidance1
Understand that chemical symbols for elements on the periodic table can be one or two letters long. The first letter is always capitalized, and if there is a second letter, it is lowercase.
Review the given options: Na, C, K, and O. Identify which ones have two letters and which have one.
Recognize that 'Na' has two letters with the correct capitalization (N capitalized, a lowercase), while 'C', 'K', and 'O' are single-letter symbols.
Recall that 'Na' is the chemical symbol for Sodium, which is an element on the periodic table.
Conclude that among the options, 'Na' is the only two-letter chemical symbol representing an element.
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