Period 1 element
A period 1 element is one of the chemical elements in the first row (or period) of the periodic table of the elements.

These are:

Chemical elements in the first period
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
#
Name		1
H		 2
He
e--conf

Alkali metalsAlkaline earthsLanthanideActinidesTransition metals
Poor metalsMetalloidsNonmetalsHalogensNoble gases

Period 1 element - Period 2 element - Period 3 element - Period 4 element - Period 5 element - Period 6 element - Period 7 element - Period 8 element





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