The size will be H- ion > H atom > H+ ion
an insulator
pretty much everything is larger than an atom.
compound
The central atom in NH2Cl is nitrogen. Nitrogen has 2 nonbonding electron pairs.
Boron trichloride is an inorganic compound that is a valuable reagent in organic synthesis. It has zero lone pairs on the central atom.
XeF4 is a molecule with 6 electron pairs around the central Xenon atom. Based on VSEPR theory, this would result in an octahedral molecular geometry with 4 bonding pairs and 2 lone pairs.
that the nucleus of the atom was a lot larger than we now believe but the charge was not as spread out as you would expect.
Tantalum
an insulator
A tetrahedron.
If an atom has a balanced charge, it means that the number of protons equals the number of electrons. So, you would expect to find the same number of protons as the atomic number of the element.
92 protons.
There are two lone pairs of electrons on the As atom in AsCl3.
The francium atom is larger.
A neutral nitrogen atom has 7 protons. This is because nitrogen has an atomic number of 7 and each atom has the same number of protons as its atomic number. Therefore a neutral nitrogen atom would have 7 protons.
Three groups bound to it with no lone pairs
the sodium atom as it has a larger nucleus and more electrons.