Question

1. name each isotope and write it in symbolic notation.

a. atomic number 26; mass number 56
b. atomic number 29; mass number 64
c. atomic number 17; mass number 37

Explanation:

Step1: Recall the periodic table

Atomic number \(Z\) determines the element. For \(Z = 26\), the element is iron (\(Fe\)), for \(Z=29\), the element is copper (\(Cu\)), and for \(Z = 17\), the element is chlorine (\(Cl\)).

Step2: Write the symbolic notation

The symbolic notation of an isotope is \(\ce{^{A}_{Z}X}\), where \(A\) is the mass number and \(Z\) is the atomic number and \(X\) is the element symbol.

• For \(Z = 26\) and \(A=56\): \(\ce{^{56}_{26}Fe}\), named iron - 56.
• For \(Z = 29\) and \(A = 64\): \(\ce{^{64}_{29}Cu}\), named copper - 64.
• For \(Z=17\) and \(A = 37\): \(\ce{^{37}_{17}Cl}\), named chlorine - 37.

Answer:

a. Iron - 56, \(\ce{^{56}_{26}Fe}\)
b. Copper - 64, \(\ce{^{64}_{29}Cu}\)
c. Chlorine - 37, \(\ce{^{37}_{17}Cl}\)