Sodium, potassium and rubidium are in the first group of the Periodic Table.
Sodium is in the period 3.
Potassium is in the period 4.
Rubidium is in the period 5.
Period 1 Group 5
Period 2: Li, Be, B, C, N, O, F, Ne Group I: The alkali metals: Li, Na, K, Rb, Cs and Fr and the first element in group I (non-metal) Hydrogen (H, gas)
Rb has lower electronegativity (0.8) where as Na is 0.9
Alkaline metals: Li, Na, K, Cs, Rb, Fr.
This group is of alkali metals including H, Li, Na, K, Rb, Cs and Fr.
H Li Na K Rb Cs
Period 1 Group 5
group 1 is Li, Na, K, Rb, Cs and Fr.
Group 1 Li, Na, K, Rb, Cs, Fr
Period 2: Li, Be, B, C, N, O, F, Ne Group I: The alkali metals: Li, Na, K, Rb, Cs and Fr and the first element in group I (non-metal) Hydrogen (H, gas)
The alkali metals are: Li, Na, K, Rb, Cs, Fr.
The alkali-group elements (group I of the periodic table) H, Li, Na, K, Rb, Cs, Fr in period 1 to 7 respectively.
Rb has lower electronegativity (0.8) where as Na is 0.9
Elements in Group 1 include, Li, Na, K, Rb, Cs, Fr
Group 1, alkalis metals: Li, Na, K, Rb, Cs, Fr.
Rb is the largest, Li the smallest in the row above. Group 1 of the periodic table: Fr > Cs > Rb > K > Na > Li > H
Li+,Na+,K+,Rb+,Cs+,Fr+