Working under the presumption that you mean H2Se: Selenium has 6 valence electrons, and each of the two Hydrogen atoms have one. The simplified Lewis dot diagram would look like: H:Se:H and the three dimensional structure would be linear. ========================================== There will be two additional lone pairs represented in the Lewis structure of H2Se, just like for water. Whether you believe that there will be hybridization or not, the hydrogen atoms won't be 180 degrees apart from one another. The bond angle usually reported for H2Se is 91 degrees, which either implies no hybridizaton or a very distorted tetrahedral (sp3) arrangement. Don't be misled by the "linearity" of the Lewis structure.
Cesium selenide
A compound that does not have a bent molecular shape is carbon dioxide (CO2). It has a linear molecular shape due to the arrangement of the three atoms in a straight line.
The molecular shape of hydrogen iodide (HI) is linear. This is because there are only two atoms in the molecule and no lone pairs on the central iodine atom, leading to a linear geometry.
Isomers.
Nitrogen is a diatomic molecule with a linear shape, as it consists of two nitrogen atoms bonded together.
The molecular shape of SCl6 is octahedral.
The molecular shape for CHI3 is trigonal bipyramidal.
Cesium selenide
The molecular shape name for C3H8 is a tetrahedron.
Parent Shape: Trigonal bipyrimidal Actual shape: Trigonal Planar
V-shape
A compound that does not have a bent molecular shape is carbon dioxide (CO2). It has a linear molecular shape due to the arrangement of the three atoms in a straight line.
The molecular shape of a magnesium hydride molecule is linear. Magnesium has a +2 charge, while hydride has a -1 charge, resulting in a linear molecular shape.
The molecular shape of CIF2 is linear. This is because there are only two atoms bonded with the central atom, which results in a linear molecular geometry.
Isomers
F2 has a linear shape.
The shape of SF4 is Sea Saw