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If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y-:X:-Y could be abbreviated as XY2Z2.

Classify these structures according to their shape.

The categories are linear, bent(~120), bent(~109), trigonal pyramidal, t-shaped, see-saw, square planar, square pyramidal

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  1. I would classify it as angular (like H2O molecules with angle about 105 or so but the table you wrote below shows XY2Z2 as bent (about 120)

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