Ametal's luster is due to
energy from the nuclei of its atoms being given off as visible light
the free flow of electrons between its atoms
light energy being absorbed and given off again by its valence electrons
valence electrons giving off energy as they collide with one another

bohr atom

The Bohr model of the atom, developed in the early twentieth century, was an attempt to explain observations about the way atoms and electrons absorb, retain and release energy. The model assumed that the atom has a structure similar to that of the solar system with the atomic nucleus at the center of the atom and the atom’s electrons move in circular orbits similar to the way planets orbit the sun. The Bohr model represented a great advancement in the understanding of atomic structure and contributed to the development of quantum mechanics.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!