Compared with the energies of neutral atoms that form the ions, a crystal lattice has:
a. zero potential energy
b. higher potential energy
c. lower potential energy
d equal potential energy

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Chemistry worksheet - i am not sure what they are asking for exactly?