To find the number of protons, neutrons, and electrons in the isotope ₈₄₃₆Kr (Krypton-84), we start by examining the notation.
The notation can be broken down as follows:
- 84 = Mass number (number of protons + number of neutrons)
- 36 = Atomic number (number of protons)
1. **Number of Protons**: The atomic number is 36, which means Krypton has 36 protons.
2. **Number of Electrons**: In a neutral atom, the number of electrons equals the number of protons. Therefore, Krypton-84 also has 36 electrons.
3. **Number of Neutrons**: To find the number of neutrons, we subtract the number of protons from the mass number:
Number of neutrons = Mass number – Number of protons
Number of neutrons = 84 – 36 = 48
So, Krypton-84 has 48 neutrons.
In summary:
- Protons: 36
- Neutrons: 48
- Electrons: 36