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--- discoveries [2021/05/26 10:54]
rapidplatypus [The prototype AC generator]
+++ discoveries [2021/08/12 05:58] (current)
piotr
@@ Line 14: / Line 14: @@
 ==== Appearance of the periodic table ====
-The modern appearance of the periodic table is due to Niels Bohr, who divided it into groups and periods. Groups are usually written in columns and periods in rows. Groups are divided into main groups and side groups. In main groups, periods occur every eight consecutive atoms, which is because there are exactly 8 electrons on the shells. [([[https://www.sciencenews.org/article/periodic-table-history-chemical-elements-150-anniversary|Science News]])]
+The modern appearance of the periodic table is due to Niels Bohr, who divided it into groups and periods. Groups are usually written in columns and periods are written in rows. Groups are divided into main groups and side groups. In main groups, periods occur every eight consecutive atoms, which is because there are exactly eight electrons on the shells. [([[https://www.sciencenews.org/article/periodic-table-history-chemical-elements-150-anniversary|Science News]])]
+{{tag>science history people}}