🔑 The periodic table consists of rows called periods and columns called groups.
💡 Elements in the periodic table are arranged by their atomic number, which determines the number of protons in their nucleus.
🔬 The group number of an element indicates the number of electrons in its outer shell.
🔑 The periodic table provides information about the number of electrons in the outer shell of an atom and the element's electronic configuration.
📊 Elements in the same group have similar chemical properties due to the same number of outer shell electrons.
🔄 Periodicity is the trend in properties across each period, with elements changing from metals to nonmetals from left to right.
🔬 The periodic table provides information about atomic radius, ionization energy, and electronegativity.
↕️ As we go down a group on the periodic table, elements become more metallic and atomic radius increases.
⚛️ Metals lose electrons while nonmetals gain electrons in reactions.
🔑 There are three groups of elements in the periodic table: alkali metals, halogens, and noble gases.
🔑 Metals become more reactive as you move down Group 1 of the periodic table.
🔑 Nonmetals become less reactive as you move down Group 17 of the periodic table.
🔑 The elements in Group 18 have a full outer shell of electrons and are very unreactive.
🔑 The densities and boiling points of Group 18 elements increase as you move down the group.
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