Group 1 Period 5
By: Noah Freedman
Elements
Hydrogen (H) E:1 P:1 N:1 AM-1.00794 amu
Lithium (Li) E:3 P:3 N:4 AM-6.941 amu
Sodium (Na) E:11 P:11 N:12 AM-22.98977 amu
Potassium (K) E:19 P:19 N:20 AM-39.0983 amu
Rubidium (Rb) E:37 P:37 N:48 AM-85.4678 amu
Cesium (Cs) E:55 P:55 N:78 AM- 132.905 amu
Francium (Fr) E:87 P:87 N:126 AM- 223 amu
Period 5
Rubidium (Rb) E:37 P:37 N:48 AM-85.4678 amu
Strontium (Sr) E:38 P:38 N:50 AM-87.62 amu
Yttrium (Y) E:70 P:70 N:104 AM-88.90585 amu
Niobium (Nb) E:41 P:41 N:52 AM-92.90638 amu
Molybdenum (Mo) E:42 P:42 N:56 AM-95.94 amu
Technetium (Tc) E:43 P:43 N:55 AM-98 amu
Ruthenium (Ru) E:44 P:44 N:58 AM-101.07 amu
Rhodium (Rh) E:45 P:45 N:58 AM-102.9055 amu
Palladium (Pd) E:46 P:46 N:50 AM-106.42 amu
Silver (Ag) E:47 P:47 N:60 AM-107.8682 amu
Cadmium (Cd) E:48 P:48 N:66 AM-112.411 amu
Indium (In) E:49 P:49 N:66 AM-114.181 amu
Tin (Sn) E:50 P:50 N:70 AM-118.71 amu
Antimony (Sb) E:51 P:51 N:70 AM-121.76 amu
Tellurium (Te) E:52 P:52 N:78 AM-127.6 amu
Iodine (I) E:53 P:53 N:74 AM-126.90447 amu
Xenon (Xe) E:54 P:54 N:78 AM-131.29 amu
Some Examples of Atomic Structures
Trends
Increases going down group 1
Decreases going left on period 5 until Pd then increases
Ionic radii
Increases going down group 1
Decreases going left on period 5 until Pd then increases
Reactivity
Group 1 is very reactive becuase they only have 1 valence electron
Period 5 decreases untill Cd then increases
Electronegativity
Group 1 decreases going down the family
Period 5 increases going right
Ionization energy
Decreases going down Group 1
Increases going right on Period 5
Valence electrons
There is only 1 valence electron for all elements in Group 1
The valence electrons increase going to the right on Period 5
Electron configuration
The configurations grow dramatically from one atom to the next in group 1
The configurations change slightly as they go right in Period 5
Lewis Structure
The structures grow dramatically from one atom to the next in group 1
The structures grow slightly as they go right in Period 5
State at room temp
All solids except hydrogen which is a gas in group 1
All solids except xenon which is a gas in period 5
Boiling point
They decrease going down group 1
Increase to Ru then decrease to Cd then jumps up and decreases the rest of the way on period 5
Melting point
They decrease going down group 1
Increase to Ru then decrease to Cd then jumps up and decreases the rest of the way on period 5