TANTALUM
1. Write the electron formulas of atoms and their ions according to Klechkovsky's rule.
2. Determine the number of protons, electrons, and neutrons for each atom.
3. Determine the number of energy levels for each atom.
4. Determine which group and subgroup (main - A or secondary - B) each atom is in.
5. Which family of elements does each atom belong to.
6. Write the abbreviated electron formulas for the outer and valence electrons of these atoms.
7. Draw the electron-graphic formulas of the valence electrons of these atoms and determine the values ​​of all the quantum numbers of these electrons.
8. Determine the total spin of the electrons of the sublevel that is filled last.
9. Determine the number of paired and unpaired valence electrons of these atoms in the normal state.
10. Determine the number of free and occupied atomic orbitals at the last level of these atoms in the normal state.
11. Write abbreviated electron and electron-graphic formulas for all possible excited states of these atoms.

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