Name all the organ systems that you would use for walking from the front of the school to your first period class. Then describe why you are using each of those systems.
(Hint: use multiple systems in answer)

Name the element in group 17, period 2. (periodic table)

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

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.