![]() ![]() Compounds that contain a metal and a nonmetal 2. Dissolving Ionic CompoundsVideo Does this work? =ģ0 Regents Chemistry Chemical Nomenclatureģ1 Naming Compounds Common names were originally developed to name compounds Ex: Epsom salts, milk of magnesia, gypsum and laughing gas Too many common names.a system had to be developed!ģ2 Naming Compounds Binary compounds – compounds that are composed of two elements We will examine two classes of binary compounds 1. Write cation first and anion second When combining, we must consider electrical charge Ions combine in such a way to make a zero net charge Total charge of cations Total charge of anion Zero net charge + =Ģ9 More Examples. Solid metals differ from solid non-metals In fact, different forms of the same element can occur These are called allotropes Ex: Carbon Diamond (very hard) Graphite (soft) Buckministerfullerene (newly discovered) Endġ7 Regents Chemistry Information on the Table Average Atomic Massġ8 Regents Chemistry Periodic Table Bingoġ9 Regents Chemistry Ions and Oxidation StatesĢ1 **Change ending of parent name to -ide and add word - ion**Ģ3 ***Keep parent name and add word - ion***Ģ7 Ionic Compounds Combination of cation and anion Metals are solids at 25 C Noble gases are gas at room 25 C and are individual atoms Several others are gases and diatomic at 25 C – (H2, N2, O2, F2, Cl2) Only two elements are liquids at 25 C Bromine and Mercury Most of the matter around us consists of mixtures Mixtures contain compounds Atoms of individual elements are not often found in nature in pure form Some exceptions: gold, platinum and silver Also noble gases – do not combine readily Ex Helium gas in underground depositsĪfter we use a chemical process to separate the elements in a compound, we find the elements to be: Monoatomic atoms– only (1) atom of the element Diatomic molecules– (2) atoms bonded togetherġ4 Examples Argon (noble gas) Nitrogen and oxygen ![]() Ductility (they can be pulled into wires) 4. Metals Alkali metals Alkaline earth metals Transition Metals Metalloids Nonmetals Halogens Nobel gasesĮfficient conduction of heat and electricity Malleability (they can be hammered into thin sheets 3. 1 Regents Chemistry Topic 2 The Periodic Table and Formulas / EquationsĢ Regents Chemistry Introduction to the Table Groups and FamiliesĮlements of Metals, Nonmetals and Metalloidsģ Recap The nucleus contains protons and neutrons NucleusĮlectrons surround the nucleus in a “cloud” Atomic number is the number of protons Atomic mass is the sum of protons and neutrons electronsĤ The Periodic Table The periodic table is arranged according to Atomic Number The first table, by Russian chemist Dmitri Mendeleev, was arranged by atomic mass, but this was not accurate Current arrangement shows many important trends.
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