Copper has two naturally occurring isotopes, 63cu (isotopic mass 62. 9296 amu) and 65cu (isotopic mass 64. 9278 amu). If copper has an atomic mass of 63. 546 amu, what is the percent abundance of each isotope? report your answer to 5 significant figures.

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.