How many protons, neutrons and electrons are in bismuth (Bi) atom?

Step 1: Define the Problem

Identify the number of protons, neutrons, and electrons in a bismuth (Bi) atom.

Step 2: Break Down the Problem

1. Determine the atomic number of bismuth to find the number of protons and electrons.
2. Use the atomic mass to calculate the number of neutrons.

Step 3: Apply Relevant Concepts

• Protons and Electrons: The atomic number of bismuth (Bi) is 83, which means it has 83 protons and, in a neutral atom, 83 electrons.
• Neutrons: The atomic mass of bismuth is approximately 209. The number of neutrons is calculated by subtracting the atomic number from the atomic mass.

Step 4: Analysis, Verify and Summarize

• Neutrons Calculation: $\text{Number of neutrons} = \text{Atomic mass} - \text{Atomic number} = 209 - 83 = 126$

Final Answer

• Protons: 83
• Neutrons: 126
• Electrons: 83