LP 4.4 The Periodic Table _ Boundless Chemistry.pdf -...

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9/19/2019The Periodic Table | Boundless Chemistry1/10The Periodic Table9/19/2019The Periodic Table | Boundless Chemistry2/10The Periodic TableThe periodic table shows all the elements and their physical properties; it is arranged based onatomic numbers and electron configurations.LEARNING OBJECTIVESIdentify the common periodic trends that can be deduced from the periodic table ofelementsKEY TAKEAWAYSKey PointsThe periodic table lists all the elements, with information about their atomicweights, chemical symbols, and atomic numbers.The arrangement of the periodic table leads us to visualize certain trendsamong the atoms.The vertical columns (groups) of the periodic table are arranged such that all itselements have the same number of valence electrons. All elements within acertain group thus share similar properties.Key Termsatomic number: The number, equal to the number of protons in an atom, thatdetermines its chemical properties. Symbol: Zgroup: A vertical column in the periodic table, which signifies the number ofvalence shell electrons in an element’s atom.period: A horizontal row in the periodic table, which signifies the total number ofelectron shells in an element’s atom.Element Symbols
9/19/2019The Periodic Table | Boundless Chemistry3/10The periodic table is structured as an 18 X 7 grid, positioned above a smaller double row ofelements. The periodic table only lists chemical elements, and includes each isotope of eachelement within one cell. In the typical periodic table, each element is listed by its element symboland atomic number. For example, “H” denotes hydrogen, “Li” denotes lithium, and so on. Mostelements are represented by the first letter or first two letters of their English name, but there aresome exceptions. Two notable exceptions include silver and mercury. The symbol for silver is “Ag”from Latinargentum,which means “gray” or “shining.” The symbol for mercury is “Hg” from theLatinized Greekhydrargyrum,which means “water-silver.” Many periodic tables include the fullname of element as well and color-code the elements based on their phase at room temperature(solid, liquid, or gas).The periodic table: The periodic table is a tabular display of all the chemical elements. The atoms aregrouped in order of increasing atomic number.Rows and PeriodsThe element symbol is always almost accompanied by other information such as atomic numberand atomic weight. Atomic number describes the number of protons in one atom of that element.For example, an atom of oxygen contains 8 protons. Elements are listed in order of increasingatomic number from left to right. Each row of the periodic table is called a period and each column9/19/2019The Periodic Table | Boundless Chemistry

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