What is the atomic number of this element?
[tex]\section*{${ }_{14}^{20} Si$}[/tex]
15
29
43
14
Answer (2)
The atomic number is the number of protons in an atom's nucleus.
In the element symbol 14 20 S i , the subscript 14 represents the atomic number.
Therefore, the atomic number of the element is 14 .
Explanation
Data Analysis The element is represented as 14 20 S i . The number 14 is in the lower left corner of the element symbol, and the number 20 is in the upper left corner of the element symbol.
Definition of Atomic Number The atomic number of an element is the number of protons in the nucleus of an atom. It is written as the subscript to the left of the element symbol.
Identifying the Atomic Number In the given element symbol 14 20 S i , the number in the lower left corner is 14. Therefore, the atomic number of the element is 14.
Final Answer The atomic number of the element 14 20 S i is 14 .
Examples
Understanding atomic numbers is crucial in chemistry. For instance, when studying the periodic table, the atomic number helps in identifying elements and predicting their properties. Elements are arranged in the periodic table based on their atomic number, which dictates their electron configuration and chemical behavior. Knowing the atomic number allows scientists to determine how an element will interact with other elements, forming compounds and participating in chemical reactions. For example, carbon (C) with an atomic number of 6, forms the backbone of organic chemistry due to its unique bonding capabilities, all stemming from its atomic structure.
The atomic number of the element 14 20 S i is 14, as indicated by the subscript in the notation. This number represents the number of protons in the nucleus of silicon. Therefore, the correct answer is 14.
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