Questions: Write the name for 54^129 X. Write the number of protons and neutrons for 54^129 X. Express your answers as integers separated by a comma. Nprotons, Nneutrons= Write the symbol for 53^129 X. Express your answer as a chemical symbol.

Write the name for 54^129 X. Write the number of protons and neutrons for 54^129 X. Express your answers as integers separated by a comma. Nprotons, Nneutrons= Write the symbol for 53^129 X. Express your answer as a chemical symbol.
Transcript text: Write the name for ${ }_{54}^{129} \mathrm{X}$. $\square$ Write the number of protons and neutrons for ${ }_{54}^{129} \mathrm{X}$. Express your answers as integers separated by a comma. $N_{\text {protons }}, N_{\text {neutrons }}=$ $\square$ Write the symbol for ${ }_{53}^{129} \mathrm{X}$. Express your answer as a chemical symbol.
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Solution

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Solution Steps

Step 1: Identify the Element from Atomic Number

The atomic number (Z) of an element is the number of protons in its nucleus. For the isotope \({ }_{54}^{129} \mathrm{X}\), the atomic number is 54. By consulting the periodic table, we find that the element with atomic number 54 is Xenon (Xe).

Final Answer for Part L

The name for \({ }_{54}^{129} \mathrm{X}\) is Xenon.

\(\boxed{\text{Xenon}}\)

Step 2: Determine the Number of Protons and Neutrons

The number of protons in \({ }_{54}^{129} \mathrm{X}\) is given by the atomic number, which is 54. The number of neutrons is found by subtracting the atomic number from the mass number (A). For \({ }_{54}^{129} \mathrm{X}\), the mass number is 129.

\[ N_{\text{neutrons}} = A - Z = 129 - 54 = 75 \]

Final Answer for Part M

The number of protons and neutrons for \({ }_{54}^{129} \mathrm{X}\) is:

\(\boxed{54, 75}\)

Step 3: Write the Symbol for the Isotope with Atomic Number 53

The element with atomic number 53 is Iodine (I). Therefore, the isotope with mass number 129 and atomic number 53 is \({ }_{53}^{129} \mathrm{I}\).

Final Answer for Part N

The symbol for \({ }_{53}^{129} \mathrm{X}\) is:

\(\boxed{{ }_{53}^{129} \mathrm{I}}\)

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