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I is the central atom single bonded to the 4 Br atoms. I also has 2 lone pairs of electrons. It may also be written without showing the lone pairs on any of the electrons, but with a negative charge on the I atom instead (that's how it was on my homework).
Molecules covalently bonded.
This is a linear molecule.
the shared valence electron pairs repel each other.
The factors affecting the shape of the molecules are the bonded e and the lone pairs of electrons
linear
linear
One on each side (at 180º) of the central atom.
Four atoms bound to a central atom with no lone pairs.
I is the central atom single bonded to the 4 Br atoms. I also has 2 lone pairs of electrons. It may also be written without showing the lone pairs on any of the electrons, but with a negative charge on the I atom instead (that's how it was on my homework).
Molecules covalently bonded.
see-saw shaped. Note that the MOLECULAR structure is only concerned about the BONDED atoms, not the lone pairs. Although we take the lone pairs repulsive effects into consideration, we do not include them when DESCRIBING the shape of the bonded atoms
electron-group geometry Apex!
When there are two atoms bonded to the central atom and no lone pairs, the molecule adopts a linear shape. When lone pairs are present, bent geometry can be present.
This is a linear molecule.
No. There is no such thing as a diatomic atom. A diatomic molecule is a molecule that contains two atoms. The number of lone pairs depends on what atoms are bonded.
The shape of a molecule only describes the arrangement of bonds around a central atom. The arrangement of electron pairs describes how both the bonding and nonbonding electron pair are arranged. For example, in its molecular shape, a water molecule is describes as bent, with two hydrogen atoms bonded to an oxygen atom. However, the arrangement of electron pairs around the oxygen atom is tetrahedral as there are two bonding pairs (shared with the hydrogen) and also two nonbonding pairs.