A molecule that has a linear shape has two electron domains around the central atom. How many lone pairs of electrons are present around the central atom? zero
one
two
three

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Element before carbon on the periodic table

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.