Question

16 s 32.06 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 53 iodine 126.905 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 25 mn 54.938 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 12 mg 24.305 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 18 argon 39.948 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 19 k 39.098 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 79 gold 196.967 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 1 h 1.008 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = 9 fluorine 18.998 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = __

Explanation:

Step1: Recall atomic number property

Atomic number = number of protons = number of electrons in a neutral atom.

Step2: Recall neutron - calculation formula

Number of neutrons = Atomic mass (rounded to nearest whole number) - number of protons.

For Sulfur (S):

• Atomic number = 16
• Atomic mass = 32.06
• Number of protons = 16
• Number of neutrons = $\lfloor32.06

floor - 16=16$

• Number of electrons = 16

For Iodine (I):

• Atomic number = 53
• Atomic mass = 126.905
• Number of protons = 53
• Number of neutrons = $\lfloor126.905

floor - 53 = 74$

• Number of electrons = 53

For Manganese (Mn):

• Atomic number = 25
• Atomic mass = 54.938
• Number of protons = 25
• Number of neutrons = $\lfloor54.938

floor - 25 = 30$

• Number of electrons = 25

For Magnesium (Mg):

• Atomic number = 12
• Atomic mass = 24.305
• Number of protons = 12
• Number of neutrons = $\lfloor24.305

floor - 12 = 12$

• Number of electrons = 12

For Argon (Ar):

• Atomic number = 18
• Atomic mass = 39.948
• Number of protons = 18
• Number of neutrons = $\lfloor39.948

floor - 18 = 22$

• Number of electrons = 18

For Potassium (K):

• Atomic number = 19
• Atomic mass = 39.098
• Number of protons = 19
• Number of neutrons = $\lfloor39.098

floor - 19 = 20$

• Number of electrons = 19

For Gold (Au):

• Atomic number = 79
• Atomic mass = 196.967
• Number of protons = 79
• Number of neutrons = $\lfloor196.967

floor - 79 = 118$

• Number of electrons = 79

For Hydrogen (H):

• Atomic number = 1
• Atomic mass = 1.008
• Number of protons = 1
• Number of neutrons = $\lfloor1.008

floor - 1 = 0$

• Number of electrons = 1

For Fluorine (F):

• Atomic number = 9
• Atomic mass = 18.998
• Number of protons = 9
• Number of neutrons = $\lfloor18.998

floor - 9 = 10$

• Number of electrons = 9

Answer:

Element	Atomic Number	Atomic Mass	# of Protons	# of Neutrons	# of Electrons
I	53	126.905	53	74	53
Mn	25	54.938	25	30	25
Mg	12	24.305	12	12	12
Ar	18	39.948	18	22	18
K	19	39.098	19	20	19
Au	79	196.967	79	118	79
H	1	1.008	1	0	1
F	9	18.998	9	10	9