Periodic Table of Elements
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Group 1

{number} elements in this group. All elements in the same group share the same number of valence electrons and show similar chemical behaviour.

7 elements

1 H Hydrogen 1.008 3 Li Lithium 7 11 Na Sodium 22.99 19 K Potassium 39.098 37 Rb Rubidium 85.468 55 Cs Cesium 132.905 87 Fr Francium 223.02