## Chemistry and Chemical Reactivity (9th Edition)

$\begin{array} {|c|cccc|} Symbol & ^{58}Ni & ^{33}S & ^{20}Ne & ^{55}Mn \\ N. of\ protons & 28 & 16 & 10 & 25 \\ N. of\ neutrons & 30& 17& 10 & 30\\ N. of\ elecrons & 28 & 16 & 10 & 25 \\ (neutral\ atom) & \\ Name & Nickel & Sulfur & Neon & Manganese \end{array}$
Relevant information: $Z=p^+=e^-$, $A=Z+n^0$ From the periodic table: $^{58}Ni$: Nickel, $Z=28, A=58\rightarrow n^0=30$ $^{33}S$: Sulfur, $Z=16, A=33\rightarrow n^0=17$ $p^+=Z=10\rightarrow Ne, Neon$, $n^0=10\rightarrow A=20$ $e^-=Z=25\rightarrow Mn, Manganese$, $n^0=30\rightarrow A=55$ $\begin{array} {|c|cccc|} Symbol & ^{58}Ni & ^{33}S & ^{20}Ne & ^{55}Mn \\ N. of\ protons & 28 & 16 & 10 & 25 \\ N. of\ neutrons & 30& 17& 10 & 30\\ N. of\ elecrons & 28 & 16 & 10 & 25 \\ (neutral\ atom) & \\ Name & Nickel & Sulfur & Neon & Manganese \end{array}$