Question

give the number of protons, neutrons, and electrons in each isotope.
part 1 of 2
thallium-203
protons:
neutrons:
electrons:

Explanation:

Step1: Find atomic number of Thallium

Thallium (Tl) has an atomic number of 81. The number of protons in an atom is equal to its atomic number. So, protons = 81.

Step2: Find number of neutrons

The mass number of Thallium - 203 is 203. The number of neutrons is calculated as mass number - atomic number. So, neutrons = 203 - 81 = 122.

Step3: Find number of electrons

For a neutral atom, the number of electrons is equal to the number of protons. So, electrons = 81 (assuming Thallium - 203 is a neutral isotope).

Answer:

Protons: 81
Neutrons: 122
Electrons: 81