Answer:
Number of neutrons of Al²⁷₁₃ = 14
Number of neutrons of Pt¹⁹⁵₇₈= 117
Number of neutrons of Co⁵⁹₂₇= 32
Number of neutrons of Ag¹⁰⁸₄₇= 61
Number of neutrons of Au¹⁹⁷₇₉ = 118
Explanation:
We know that atomic number of an atom is number of electron or protons while atomic mass is sum o number of neutrons and and protons.
Shorthand notations of given elements:
Al²⁷₁₃
This notation shows that atomic number of Al-27 is 13 and atomic mass is 27.
Number of neutrons of Al²⁷₁₃ = 27 - 13
Number of neutrons of Al²⁷₁₃ = 14
Pt¹⁹⁵₇₈
This notation shows that atomic number of Pt-195 is 78 and atomic mass is 195.
Number of neutrons of Pt¹⁹⁵₇₈ = 195 - 78
Number of neutrons of Pt¹⁹⁵₇₈= 117
Co⁵⁹₂₇
This notation shows that atomic number of Co-59 is 27 and atomic mass is 59.
Number of neutrons of Co⁵⁹₂₇ = 59 - 27
Number of neutrons of Co⁵⁹₂₇= 32
Ag¹⁰⁸₄₇
This notation shows that atomic number of Ag-108 is 47 and atomic mass is 108.
Number of neutrons of Ag¹⁰⁸₄₇ = 108 - 47
Number of neutrons of Ag¹⁰⁸₄₇= 61
Au¹⁹⁷₇₉
This notation shows that atomic number of Au-197 is 79 and atomic mass is 197.
Number of neutrons of Au¹⁹⁷₇₉ = 197 - 79
Number of neutrons of Au¹⁹⁷₇₉ = 118
