Question

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).

Answer 1

Answer:   In table below.

Explanation:

A.N. (atomic number) = protons

Mass (Total AMU)

Charge

P= Protons, same as atomic number

N = Neutrons, Atomic Mass Number - Protons

E = Electrons.  (Atomic Number - Charge)

Element = Defined by atomic number

Answer 2

a) Atomic number=9   Protons = 9, neutrons = 9, electrons = 10

b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36

c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52

d) Atomic number=81,  Protons = 81, neutrons = 120, electrons = 80

e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.

What is the atomic number?

Atomic Number (Z)= number of protons = number of electrons

Mass number (A) = number of protons + number of neutrons.

For ions with a positive net charge:

Number of electrons = Z - net charge

For ions with negative net charge:

Number of electrons = Z + net charge

a) Atomic number=9   Protons = 9, neutrons = 9, electrons = 10

b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36

c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52

d) Atomic number=81,  Protons = 81, neutrons = 120, electrons = 80

e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.

Learn more about the atomic number here:

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