![]() Mendeleev’s periodic table was organized by increasing atomic mass. ![]() Groups have similar chemical and physical properties.Ģ Mendeleev created first useful table of elements in 1869 Atomic number increases by one moving from left to right across search period. Pg 391 -Periodic means– the table has repeating cycles or patterns (392) Row also called a period. ![]() Pg 391."- Presentation transcript:ġ Periodic Table Def.-A periodic table is a chart of elements arranged into rows and columns according to their physical and chemical properties. Hydrogen gas can be produced in a lab by combining a dilute acid with a metal.Presentation on theme: "Periodic Table Def.-A periodic table is a chart of elements arranged into rows and columns according to their physical and chemical properties.However, it became too dangerous because of its highly flammable nature. ![]()
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