Determine the number of protons, neutrons, and electrons in the following isotopes that are used in medical diagnoses:

(a) atomic number 9_, mass number 18_, charge of 1^-

b) atomic number 43, mass number 99, charge of 7⁺

(c) atomic number 53, atomic mass number 131, charge of 1^-

(d) atomic number 81, atomic mass number 201, charge of 1⁺

(e) Name the elements in parts (a), (b), (c), and (d)

Given,theatomic number 9 mass number 18 charge of 1^-

Number of protons = atomic number

=9

Number of neutrons= mass number atomic number

= 18-9

=9

Number of electrons = atomic number Charge

=9-(-1)

=10

Given,theatomic number 43 mass number 99 charge of 7⁺

Number of protons = atomic number

= 43

Number of neutrons= mass number atomic number

= 99-43

=56

Number of electrons = atomic number Charge

=43 - 7

=36

Given,theatomic number 53 mass number 131 charge of 1^-

Number of protons = atomic number

=53

Number of neutrons= mass number atomic number

= 131-53

=78

Number of electrons = atomic number Charge

=53-(-1)

=54

Given,theatomic number 81 mass number 201 charge of 1⁺

Number of protons = atomic number

=81

Number of neutrons= mass number atomic number

= 201-81

=120

Number of electrons = atomic number Charge

=81-1

=80

(a). The atom having atomic number 9 is Fluorine.

(b). The atom having atomic number 43 is Technetium.

(c). The atom having atomic number 53 is Iodine.

(d). The atom having atomic number 81 is Thallium.