What is the mass notation for [tex]^{29}_{14}[/tex] this element?
A. silicon-14
B. silicon-29
C. silver-14
D. silver-29
Answer (2)
Identify the element with atomic number 14 as silicon (Si).
Recognize that the mass number is 29.
Express the mass notation as silicon-29.
The correct mass notation is silicon-29 .
Explanation
Problem Analysis The problem provides the mass number (29) and the atomic number (14) of an element and asks for the correct mass notation. We need to identify the element and represent it using the correct notation.
Identifying the Element and Notation The element with atomic number 14 is silicon (Si). The mass number is 29. The mass notation is written as the element symbol with the mass number as a superscript to the left. Therefore, the mass notation is 29 Si . Alternatively, it can be written as silicon-29.
Selecting the Correct Option Comparing the derived notations with the given options, we find that silicon-29 is the correct answer.
Final Answer The mass notation for the element with atomic number 14 and mass number 29 is silicon-29.
Examples
Understanding mass notation is crucial in various fields, such as nuclear chemistry and isotope analysis. For instance, in carbon dating, scientists use the mass notation of carbon isotopes (e.g., carbon-14, denoted as 14 C ) to determine the age of organic materials. The relative abundance of different isotopes helps in tracing the origin and history of samples, which is vital in archaeology and environmental science. This notation helps to differentiate between isotopes of the same element, each having unique nuclear properties and applications.
The mass notation for the element 14 29 is silicon-29, as the atomic number of 14 corresponds to silicon, and the mass number is 29. Therefore, the correct choice is B. silicon-29.
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