Multiple Choice
Which of the following element symbols represents the element with atomic number 12 among the first 20 elements of the periodic table?
68
views
2. Atoms & Elements
Periodic Table: Element Symbols
Multiple Choice
Which of the following is a two-letter chemical symbol for an element on the periodic table?
A
O
B
C
C
Na
D
K
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.
Look at each option and check if it follows the correct format for chemical symbols: a single capital letter or a capital letter followed by a lowercase letter.
Identify which options are one-letter symbols: 'O' (Oxygen), 'C' (Carbon), and 'K' (Potassium) are all valid one-letter symbols.
Check the option 'Na' to see if it is a valid two-letter symbol. 'Na' stands for Sodium, which is an element on the periodic table and correctly formatted with a capital 'N' and lowercase 'a'.
Conclude that 'Na' is the only two-letter chemical symbol among the options, making it the correct answer.
