Question

79 au 196.967 # of protons __ # of neutrons # of electrons 9 fluorine 18.998 # of protons # of neutrons # of electrons 14 silicon 28.086 # of protons # of neutrons # of electrons ag 107.87 # of protons # of neutrons # of electrons tm 168.93 # of protons # of neutrons # of electrons xe 131.30 # of protons # of neutrons # of electrons lead 207.2 # of protons # of neutrons # of electrons antimony 121.75 # of protons # of neutrons # of electrons tungsten 183.85 # of protons # of neutrons # of electrons 114.82 # of protons # of neutrons # of electrons 74.922 # of protons # of neutrons # of electrons 91.22 # of protons # of neutrons # of electrons __

Explanation:

Step1: Recall atomic number = protons

The atomic number of an element is equal to the number of protons. For a neutral atom, the number of electrons is equal to the number of protons. The number of neutrons is calculated as mass - number of protons (where mass is the atomic - mass rounded to the nearest whole number).

Step2: Analyze Au (Gold)

Atomic number of Au is 79. So, number of protons = 79, number of electrons = 79. Atomic mass is 196.967. Rounding to 197, number of neutrons = 197 - 79=118.

Step3: Analyze F (Fluorine)

Atomic number of F is 9. So, number of protons = 9, number of electrons = 9. Atomic mass is 18.998. Rounding to 19, number of neutrons = 19 - 9 = 10.

Step4: Analyze Si (Silicon)

Atomic number of Si is 14. So, number of protons = 14, number of electrons = 14. Atomic mass is 28.086. Rounding to 28, number of neutrons = 28 - 14 = 14.

Step5: Analyze Ag (Silver)

Atomic number of Ag is 47. So, number of protons = 47, number of electrons = 47. Atomic mass is 107.87. Rounding to 108, number of neutrons = 108 - 47 = 61.

Step6: Analyze Tm (Thulium)

Atomic number of Tm is 69. So, number of protons = 69, number of electrons = 69. Atomic mass is 168.93. Rounding to 169, number of neutrons = 169 - 69 = 100.

Step7: Analyze Xe (Xenon)

Atomic number of Xe is 54. So, number of protons = 54, number of electrons = 54. Atomic mass is 131.30. Rounding to 131, number of neutrons = 131 - 54 = 77.

Step8: Analyze Pb (Lead)

Atomic number of Pb is 82. So, number of protons = 82, number of electrons = 82. Atomic mass is 207.2. Rounding to 207, number of neutrons = 207 - 82 = 125.

Step9: Analyze Sb (Antimony)

Atomic number of Sb is 51. So, number of protons = 51, number of electrons = 51. Atomic mass is 121.75. Rounding to 122, number of neutrons = 122 - 51 = 71.

Step10: Analyze W (Tungsten)

Atomic number of W is 74. So, number of protons = 74, number of electrons = 74. Atomic mass is 183.85. Rounding to 184, number of neutrons = 184 - 74 = 110.

Step11: Element with mass 114.82

This is Indium (In). Atomic number of In is 49. So, number of protons = 49, number of electrons = 49. Rounding mass to 115, number of neutrons = 115 - 49 = 66.

Step12: Element with mass 74.922

This is Arsenic (As). Atomic number of As is 33. So, number of protons = 33, number of electrons = 33. Rounding mass to 75, number of neutrons = 75 - 33 = 42.

Step13: Element with mass 91.22

This is Zirconium (Zr). Atomic number of Zr is 40. So, number of protons = 40, number of electrons = 40. Rounding mass to 91, number of neutrons = 91 - 40 = 51.

Answer:

Au: Protons: 79, Neutrons: 118, Electrons: 79
F: Protons: 9, Neutrons: 10, Electrons: 9
Si: Protons: 14, Neutrons: 14, Electrons: 14
Ag: Protons: 47, Neutrons: 61, Electrons: 47
Tm: Protons: 69, Neutrons: 100, Electrons: 69
Xe: Protons: 54, Neutrons: 77, Electrons: 54
Lead: Protons: 82, Neutrons: 125, Electrons: 82
Antimony: Protons: 51, Neutrons: 71, Electrons: 51
Tungsten: Protons: 74, Neutrons: 110, Electrons: 74
Element with mass 114.82: Protons: 49, Neutrons: 66, Electrons: 49
Element with mass 74.922: Protons: 33, Neutrons: 42, Electrons: 33
Element with mass 91.22: Protons: 40, Neutrons: 51, Electrons: 40