Final answer:
Three different atomic cations with 29 electrons are Cu+ (copper(I) cation), Zn+ (zinc(I) cation), and Ga3+ (gallium(III) cation).
Step-by-step explanation:
To write the chemical symbols for three different atoms or atomic cations with 29 electrons, we first must recognize that an atom with 29 electrons is copper (Cu) in its neutral state. Copper has an atomic number of 29, meaning it also has 29 protons. Its neutral atom configuration would thus have 29 electrons. However, when copper forms cations, it can lose one or two electrons to form Cu+ (also with 29 electrons because it lost just one electron) or Cu2+ with 28 electrons, not 29. To find different atoms or cations with 29 electrons, we look to ions formed from elements with atomic numbers higher than that of copper.
For example:
- Nickel (Ni) has an atomic number of 28, so the Ni2+ cation would have 26 electrons, not 29.
- Zinc (Zn) has an atomic number of 30, so the Zn+ cation would have 29 electrons.
- Gallium (Ga) has an atomic number of 31, so the Ga3+ cation would also have 29 electrons.
In conclusion, three different atomic cations with 29 electrons are Cu+ (copper(I) cation), Zn+ (zinc(I) cation), and Ga3+ (gallium(III) cation).