1) can bond order be a negative value?

2) for the h2+ molecule, absorption of light can cause an electron to be promoted from the
σg to the σu* orbital. the equilibrium bond length for the resulting excited molecule will
be

a) shorter than for h2+ in the ground state.
b) longer than for h2+ in the ground state.
c) equal to that for h2+ in the ground state.
d) none of the above. the molecule is not stable and the will fall apart.

Compare and contrast the bohr model and the electron cloud models of the atom.

Which metal exist in liquid state and can be cut with knife ?

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?