Elements.pdf

Science and Health 7 Work Plan 01 02 03 04 Routine Activity Checking Wrap up Classification of Elements Periodic Table of Elements ◈ It is a lists of all known elements. ◈ Dmitri Mendeleev was the first to classify elements ◈ Elements are organized by: ⬥ Atomic number ⬥ Chemical properties 4 Periodi...

Science and Health 7 Work Plan 01 02 03 04 Routine Activity Checking Wrap up Classification of Elements Periodic Table of Elements ◈ It is a lists of all known elements. ◈ Dmitri Mendeleev was the first to classify elements ◈ Elements are organized by: ⬥ Atomic number ⬥ Chemical properties 4 Periodic Table of Elements 5 Reading Periodic Table 6 Periodic Table of Elements ◈ How is Periodic table arranged with respect to the atomic number? The periodic table is arranged 7 Groups and Periods ◈ Group – vertical column ⬥ ⬥ Elements in the same groups have similar chemical properties 18 columns ◈ Period – horizontal row ⬥ 7 periods 8 Periodic Table of Elements 9 Groups have the same chemical properties 10 Metals, Nonmetals, and Metalloids Metals Nonmetals Metalloids Metals ◈ Physical properties of metals ⬥ Good conductors of heat & electricity ⬥ Malleable (can be hammered into sheets) ⬥ Ductile (can be drawn into wires) ⬥ Lustrous 12 Nonmetals ◈ Physical properties of nonmetals ⬥ Poor conductors ⬥ Brittle 13 Metalloids 14