diff --git a/1A_elements.txt b/1A_elements.txt
index 391de5e..d31428d 100644
--- a/1A_elements.txt
+++ b/1A_elements.txt
@@ -1 +1,6 @@
 H(1)
+Li(3)
+Na(11)
+K(19)
+Rb(37)
+