The bromine atom possesses `3s` electrons. It contains six electrons in `2p` orbitals, six electrons in `3p` orbitals and five electrons in `4p` orbitals. 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 analyze the given information step by step.

### 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 (Z) and the shielding effect caused by other electrons.

### Step 2: Identify the Electron Shells and Orbitals
In the bromine atom:
- There are 6 electrons in the 2p orbitals.
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