Which molecule has a tetrahedral arrangement of electron pairs but is not a tetrahedral molecule?

methane

water

carbon dioxide

boron trifluoride

Water

Explanation:

Electron geometry (arrangement) is tetrahdral but its molecular geometry is bent.

Oxygen has 6 electrons in the outermost shell but it only uses 2 electrons for forming bonds with 2 Hydrogen atoms. The oxygen atom - center atom is surrounded by four electron pairs (2 pairs with 2 Hydrogen atoms, 2 lone pairs) so that its shape is tetrahedral. In contrast, it's supposed to be linear shaped but in fact it has bent molecular geometry due to lone pairs repel other electron pairs more strongly than bonded electrons.

answer: h+ its less than oh

explanation:

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.