A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the elements.

These are:

Chemical elements in the second period
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
#
Name		3
Li		 4
Be		 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
e--conf

Alkali metalsAlkaline earthsLanthanideActinidesTransition metals
Other 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