Basic Electron Configs
Most Stable Electron Configs
Periodic Table
Trends
History
100
Give the electron configuration for Al
[Ne], 3s2, 3p1
100
Give the most stable electron configuration for P
[Ne], 3s2, 3p3
100
What are rows called?
Periods
100
What is the trend for atomic size moving down a Family?
Increase in size
100
Known as "The Father of the Modern Periodic Table"
Mendeleev
200
Give electron configuration for Ca
[Ar], 4s2
200
Give the most stable electron configuration for C
[He], 2s1, 2p3
200
What are columns called?
Groups or Families
200
What trend in reactivity exists in Group 1 & II metals as you move down the Family? Must explain reason also.
They become more reactive because as you move down each level, the outermost electrons become further away from nucleus and since these metals want to lose electrons, it is easier for these electrons to be pulled off as they are not attracted as much to positive nucleus.
200
Order elements by increasing atomic mass and noticed that every 8th element had very similar properties.
John Newlands
300
Give the electron configuration for Tc
[Kr], 5s2, 4d5
300
Give the most stable electron configuration for Fe+3
[Ar], 4s2, 3d0. 4p3
300
What Family of Elements is known for not being reactive?
Noble gases or Group 18
300
Why is Fluorine more electronegative than Iodine?
Because its atomic size is smaller and therefore it can get its nucleus in closer to another atom in order to pull or attract the other atom's outermost electrons to its own + nucleus.
300
Grouped Known elements of his time by similarities.
Lavoisier
400
Give the electron configuration for Zn+2
[Ar], 4s2, 3d8
400
Give the most stable electron configuration for Ag+1
[Kr], 5s2, 4d5, 5p3
400
What Group/Family have electron configs ending in ___p5
Group 17 or Halogens
400
Draw the complete trends for reactivity within the periodic table.
I know the answer. See overhead.
400
Found several groupings of 3 elements (Triads) where he noticed the mass of the middle element was the average of the lightest and heaviest elements in the triad.
Johann Wolfgang Döbereiner
500
Give the electron configuration for Hg+2
[Xe], 6s2, 5d8
500
Give the most stable electron configuration for O
[He], 2s0, 2p6
500
What element has the electron configuration ending in: 5s2, 4d3
Nb
500
Draw the trends for ionization energy and electronegativity on a period table and explain why they both decrease as you move down families.
They decrease because: Ionization Energy - because becomes easier to pull outermost electron off because atoms are becoming larger and the electron(s) are further away from (+) nucleus and aren't attracted so well. Electronegativity - smaller the atom, closer its nucleus can get to another atom's outermost electrons.
500
Final modern day periodic table based on his work. He ordered the elements by increasing proton number and kept similar elements in columns.
Henri Mosely
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