Assigment 5

Question 1

Work Function (Definition)

Answer 1

The energy requiered to remove an electron from a surface of a solid element.

Question 2

Maximum Kinetic energy

Answer 2

KE mmax = E photon - E

The maximum kinetoic energy is of the electron is the difference between the neergy of the incident photon and the work function

Question 3

Energy of the incident photon

Answer 3

Amount o energy carried by a single photon of light that hits the surface if a material.
The energy of the photon is directly related to its wavelength or frequency.

Question 4

Emission Spectrum (definition)

Answer 4

When hydrogen atoms are excited; that is, they contain excess energy, which they release by emitting light of various wavelength to produce what is called the emission spectrum of the hydrogen atom.

Question 5

Energy levels available tp the electron in the hydrogen atom is :

Answer 5

E = -2.178 X 10 ^{-18} J (Z^2/ n^2)

-n is an integer ( the larger the value of n, the larger is the orbit radius)
-Z is the atomic number.
-The negative sign means that the energy of the electron bound to the nucleus is lower than it would be if the electron were at an infinite distance ( n = infit) from the nucleus.
-Equation can be used to calculate the change in energy when the electron changes orbits

Question 6

Ground State (definition)

Answer 6

Lowest possible energy state

Question 7

Change in energy when, electronm changes orbit

Answer 7

is Change_E = final State - Initial State.

If E is negative that ,means that the electron form changing from orbit one to orbit two had lost energy, making the hydrogen atom less charge and more stable

Question 8

What are the four quantum values

Answer 8

N = maginitud
L = shape
ml = magnetif quantum #; orientation
ms = spin

Question 9

Types of L shapes

Answer 9

L = n -1

L = 0; S ; sphere (sublevel)
L = 1; P = infinity
L = 2; d = butteryfly
L =3; f = everything