The bromine atom posseses `3s` electrons It contain six electron in `2p` orbits six electron in `3p` orbit and five electron `4p` orbits .Which of these electrons experience the lower effective nuclear charge ?

Explanation

To determine which electrons in the bromine atom experience the lower effective nuclear charge, we can follow these steps:

### Step 1: Understand Effective Nuclear Charge (Z_eff)
Effective nuclear charge (Z_eff) is the net positive charge experienced by an electron in a multi-electron atom. It takes into account the actual nuclear charge (the total number of protons in the nucleus) and the shielding effect caused by other electrons.

### Step 2: Identify the Electron Shells
In a bromine atom (which has 35 electrons), the electrons are distributed in various shells:
- 2p orbit: 6 electrons
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