How many horizontal rows are present in modern periodic table?
PERIODIC TABLE
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File:Periodic Table Chart-first-row-highlighted.png - Wikimedia Commons
The horizontal rows on a periodic table are called "perio...
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Each horizontal row is called a PERIOD. Properties of elements change greatly across any one r… | Physical science middle school, Teaching science, Physical science
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Periodic Table
:max_bytes(150000):strip_icc()/periodic-table-of-the-elements-2017--illustration-769723031-5aa02f9b04d1cf00386ccf7c.jpg "Definition of a Chemical Period - Chemistry Glossary")
Definition of a Chemical Period - Chemistry Glossary
Chem4Kids.com: Elements & Periodic Table: Periodic Table
SOLVED:Which element in the second row of the periodic table is (a) a halogen; (b) an alkali metal; (c) an alkaline earth metal; (d) a noble gas?
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