In a tetrahedral shape, a central atom is surrounded by four other atoms or groups of atoms, positioned at the corners of a tetrahedron. This geometric arrangement occurs in ions like ammonium (NH₄⁺) and phosphate (PO₄³⁻), where the central atom is bonded to four surrounding atoms. The bond angles in a tetrahedral structure are approximately 109.5 degrees, allowing for an optimal spatial arrangement that minimizes repulsion between the electron pairs.
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