Chemistry Homework Help Please (2)?
A.the principal quantum number
C.the Pauli exclusion principle
D. the sum of an atom's sublevels
12. We can describe ___energy as the energy a body has depending on its position with relationship to another body
13."Its bonds are strong, and its more or less nonmobile nuclei are surrounded by a sea of mobile electrons" This sentence is expresses ___bonds
14.According to Hund's rule, electrons fill sublevels one electron at a time, and all ___electrons around a given atom will have?
A.paired, the same spin
B.unpaired, the same spin
C.paired, a single negative charge
D. unpaired, equal valence energy
15.Looking at the Periodic Table, we find that in every vertical group, electronegativity _____as we move down and as atomic number increases. At the same time, moving horizontally across a row of the table, we find that electronegativity _____as we move from left to right?
16.If two atoms form a molecule, the approximated distance between the nuclei of the two atoms is called the?
A.covalent atomic radius
C.bond length less the covalent atomic radius
D.effective bond radius
17. Expressed as joules per gram degree,____heat capacity is a quantity necessary to raise the temperature of one gram of any substance by one degree celsuis.
18.As determined by the work of physicist Niels Bohr, an atom emits energy when one of its electrons falls from a higher to a lower energy level. Following from this observation, the Bhor model also proposes that the difference between the two energy levels in such a case determines the?
A. color of the electron
B. frequency of the emitted radiation
C. instability of the atom's nucleus
D. mass of the emitted radiation