Velocity decreases across a rough surface due to friction; vice-versa, on a slippery surface (a smooth surface, or one lubricated by oil or soap), the friction decreases, which in turn increases the velocity.
Answer:the number of particles dissolved
Explanation:
Colligative properties are properties that depend on the number of solutes dissolved in solution, that is, they depend on the amount (number of moles) of solute present in solution. They include; freezing point depression, boiling point elevation and osmotic pressure.
Electronic configuration of bismuth is given as:
When electron is removed from bismuth then bismuth is ionized to , the electronic configuration becomes:
Now, n represents the principal quantum number which determines the distance from the orbital of the electrons i.e. size of the orbital and its energy.
Thus, outer most electron is present in shell number 6. Thus, principal quantum number is (n=6).
Now, l represents the azimuthual quantum number which determines the shape of an orbital.
Now, if the outer most electron is present in s orbital then the l =0, if the outer most electron is present in p orbital then the l =1, if the outer most electron is present in d orbital then the l =2, if the outer most electron is present in f orbital then the l =4 and if the outer most electron is present in d orbital then the l =2, if the outer most electron is present in h orbital then the l =5.
l 0 1 2 3 4 5
Letter s p d f h
Thus, azimuthual quantum number is 1 as the outer most electron is present in the p orbital.
Answer:
D. The behavior of an atom's electrons can be described by circular orbits around a nucleus.
Explanation:
<em>Which of the following statements is INCORRECT? </em>
<em>A. It is not possible to know the exact location of an electron and its exact energy simultaneously.</em> CORRECT. This is known as the Heisenberg's uncertainty principle.
<em>B. The energies of an hydrogen atom's electrons are quantized.</em> CORRECT. According to the modern atomic model, the energy levels are quantized, that is, they have a discrete amount of energy.
<em>C. The wave mechanical model correctly predicts all the energy states and the orbitals available to an electron in an hydrogen atom.</em> CORRECT. The characteristics of the energy levels are explained by Schrödinger's wave equation.
<em>D. The behavior of an atom's electrons can be described by circular orbits around a nucleus.</em> INCORRECT. This was postulated by Bohr's atomic model but it is now considered to be incorrect.
<em>E. Electrons have both wave and particle properties.</em> CORRECT. This is what De Broglie called wave-particle duality.