ELECTRON ARRANGEMENT WORKSHEET



CHAPTER 5 WORKSHEET NAME:

DATE:

1. Define the terms below:

a. orbital: axis that holds 2 electrons

b. valence electron: electrons found on the outer most energy level of an atom

c. ground state: energy level where the electron starts (normal position)

d. excited state: higher energy position that the electron jumps to

2.

[pic]

a. On the wave above label the wavelength and amplitude.

b. If the energy of the wave doubles, what happens to the frequency?

c. If the energy of the wave doubles, what happens to the wavelength?

d. Energy is found in tiny bundles called __________________________.

e. When an electron absorbs energy, it jumps (towards, away from) the nucleus.

f. An electron releases energy when it jumps (towards, away from) the nucleus.

g. What effect would tripling the wavelength have on the frequency of the wave?

h. What effect would tripling the energy have on the frequency of the wave?

i. Sketch a graph showing the relationship between energy and frequency of a wave.

3. Arrange the types of electromagnetic radiation listed below in order of increasing energy, wavelength and frequency:

copper flame, sodium flame, radio waves, gamma rays

Energy: _radio_____ < _sodium_____ < __copper______ < __gamma____

Wavelength: _gamma___ < __copper_____ < __sodium______ < ___radio_________

Frequency: _radio_____ < _sodium_____ < __copper______ < __gamma____

4. a. How many electrons can fit in the fourth energy level? ___32_____________

b. How many sublevels are in the fourth energy level? ___4_____________

c. How many electrons can fit in the 5th energy level? ___50_____________

5. State the laws below in your own words:

a. Hund’s Rule: when electrons fill equal energy orbitals, they do so with parallel spins first (one electron in each orbital before they double up)

b. Aufbau Principle: electrons take the lowest energy path available first

c. Pauli Exclusion Principle: no 2 electrons have the same 4 quantum numbers so they must have opposite spins

6. (Review): Define the terms below in your own words. Include everything you know about the term:

atomic number: number of protons in an atom

atomic mass number: mass of an atom rounded to the nearest whole number

isotope: 2 atoms of the same element that have different masses (different amounts of neutrons)

ion: charged particle (number of protons ≠ number of electrons)

proton: positively charged subatomic particle found in the nucleus

neutron: neutral subatomic particle found in the nucleus

electron: negatively charged subatomic particle found in the electron cloud

alpha particle: a helium particle (2 protons, mass of 4)

beta particle: an electron given off (0 protons, charge of -1)

7. Write the isotopic notation for a particle that has 38 protons, 52 neutrons and 36 electrons.

8. Complete the chart below:

|Element |Protons |Neutrons |Electron Configuration |Orbital Filling Diagram |Electron Dot |

| | | |(complete or abbreviated) |(complete or abbreviated) |Diagram |

| |14 |14 |[Ne] 3s23p2 |[Ne] ___ ___ ___ ___ |4 dots |

|14Si | | | |3s 3p | |

| |38 |50 |[Kr] 5s2 |[Kr] ___ |2 dots |

|38Sr | | | |5s | |

| |25 |30 |[Ar] 4s23d5 |[Ar] ___ ___ ___ ___ ___ ___ |2 dots |

|25Mn | | | |4s 3d | |

| |35 |45 |[Ar] 4s23d104p5 |[Ar] ___ ___ ___ ___ ___ ___ ___ ___ ___ |7 dots |

|35Br | | | |4s 3d 4p | |

| |48 |64 |[Kr] 5s24d9 |[Kr] ___ ___ ___ ___ ___ ___ |2 dots |

|48Cd | | | |5s 4d | |

| |54 |77 |[Kr] 5s24d105p6 |[Kr] ___ ___ ___ ___ ___ ___ ___ ___ ___ |8 dots |

|54Xe | | | |5s 4d 5p | |

9. Write the abbreviated electron configuration only for each element below. Then draw its electron dot diagram.

|ELEMENT |ABBREVIATED ELECTRON CONFIGURATION |DOT DIAGRAM |ELEMENT |ABBREVIATED ELECTRON CONFIGURATION |DOT DIAGRAM |

| |[Ar] 4s23d1 |2 dots | |[Kr] 5s24d2 |2 dots |

|21Sc | | |40Zr | | |

| |[Kr] 5s24d6 |2 dots | |[Xe] 6s1 |1 dot |

|44Ru | | |55Cs | | |

| |[Xe]6s24f145d6 |2 dots | |[Ar] 4s23d104p3 |5 dots |

|76Os | | |33As | | |

6. Complete the chart below:

|Element |Protons |Neutrons |Electron Configuration |Orbital Filling Diagram |Electron Dot |

| | | |(complete or abbreviated) |(complete or abbreviated) |Diagram |

| | | | | | |

| | | | | | |

|14Si | | | | | |

| | | | | | |

| | | | | | |

| | | | | | |

|38Sr | | | | | |

| | | | | | |

| | | | | | |

| | | | | | |

|25Mn | | | | | |

| | | | | | |

| | | | | | |

| | | | | | |

|35Br | | | | | |

| | | | | | |

| | | | | | |

| | | | | | |

|48Cd | | | | | |

| | | | | | |

| | | | | | |

| | | | | | |

|54Xe | | | | | |

| | | | | | |

-----------------------

towards

Cut in thirds

[pic]+2

triple

Away from

quanta

Cut in half

doubles

wavelength

amplitude

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