Let's break down the problem: 1. **Mass of all electrons** = \(2.55 \times 10^{-26}\) g - Mass of 1 electron ≈ \(9.11 \times 10^{-28}\) g - Number of electrons = \(\frac{2.55 \times 10^{-26}}{9.11 \times 10^{-28}} \approx 28\) 2. **Mass of all protons** = \(5.34 \times 10^{-23}\) g - Mass of 1 proton ≈ \(1.67 \times 10^{-24}\) g - Number of protons = \(\frac{5.34 \times 10^{-23}}{1.67 \times 10^{-24}} \approx 32\) 3. **Element identity:** Atomic number = number of protons = **32** - Atomic number 32 corresponds to **Germanium (Ge)** 4. **Ion charge:** - Charge = Number of protons - Number of electrons = 32 - 28 = **+4** **Answer:** **a) Ge⁺⁴** --- **Final Answer: a) Ge⁺⁴**