Question

fill in the information missing from this table.

nuclide	protons	neutrons	z	a
	24	29
			27	59

Explanation:

Step1: Recall atomic number and mass - number definitions

The atomic number \(Z\) is equal to the number of protons. The mass number \(A\) is the sum of protons and neutrons (\(A = Z + N\), where \(N\) is the number of neutrons).

Step2: Analyze \(_{31}^{71}\text{Ga}\)

For \(_{31}^{71}\text{Ga}\), the atomic number \(Z = 31\), so the number of protons is 31. The number of neutrons \(N=A - Z=71 - 31 = 40\). Here \(Z = 31\) and \(A = 71\).

Step3: Analyze the second - row entry

Given the number of protons \(Z = 24\), the element is chromium (\(\text{Cr}\)). The number of neutrons \(N = 29\), and the mass number \(A=Z + N=24 + 29 = 53\).

Step4: Analyze the third - row entry

Given \(Z = 27\), the element is cobalt (\(\text{Co}\)). Since \(A = 59\), the number of protons is 27. The number of neutrons \(N=A - Z=59 - 27 = 32\).

Answer:

nuclide	protons	neutrons	\(Z\)	\(A\)
\(_{24}^{53}\text{Cr}\)	24	29	24	53
\(_{27}^{59}\text{Co}\)	27	32	27	59