The free-electron model of metals assumes that the outermost valence electrons of each atom are free to roam about the metal. In its simplest form, the metal is modeled as a box with zero potential energy inside and infinite potential energy outside. To describe the behavior of electrons in such a potential, we need to determine the allowed quantum states and how the electrons are distributed among those states. The number of quantum states available with energies

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.