The answer choices for this question wasn't provided. Oxygen has the smallest atomic radius. The higher the electronegativity in an element makes the atomic radius smaller.
Potassium Dichromate
The subscript of the second ion identifies the oxidation state of the transition metal
No. H2 does not have a permanent dipole moment.
The type of bond is determined by the difference in electrongativity of atoms
The lone pair pushes bonding electron pairs away.
Six in p orbital, in each sublevel of p (px, py, pz) there are two electrons at max.
1s22s22p63s23p64s23d5
K+
The lone pair repels the electrons of the adjacent bonds more so than does a bonding pair of electrons, so thus alters the molecular geometry of the molecule.
a hydrogen bond