Group 1 Period 5

By: Noah Freedman

Elements

Group 1

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


Average Atomic Mass Examples

Some Examples of Atomic Structures

Trends

Atomic radii

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