Chemistry

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Science Review of Alkaline Earth Metals
Science Review of Alkaline Earth Metals 150 150 Deborah

Overview The alkaline earth metals are the next column in the periodic table from the alkaline metals. They include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and…

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Science Review of Alkali Metals
Science Review of Alkali Metals 150 150 Deborah

Overview The alkali metals are in Group 1 of the periodic table.  They include the elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).  These…

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Science Review of Chemical Equations
Science Review of Chemical Equations 150 150 Deborah

Overview Chemical equations are shorthand descriptions of the reactions between substances.  They include the chemicals that react, the conditions for reaction, the products of the reaction, and the amounts of…

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Science Review of Compounds
Science Review of Compounds 150 150 Deborah

Overview Chemical elements are often found within chemical compounds, in which one or more elements are bonded together.  Some elements exist freely in compounds with one another, while others are…

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Science Review of Hydrogen Isotopes
Science Review of Hydrogen Isotopes 150 150 Deborah

Overview The element hydrogen is the lightest of all elements in the periodic table, with one proton in its nucleus. It is also the most abundant element in the universe. …

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Science Review of Stellar Structure and Nuclear Reactions inside Stars
Science Review of Stellar Structure and Nuclear Reactions inside Stars 150 150 Deborah

Overview The nuclear energy that powers stars depends upon the core temperature and the available fuel. During the main-sequence phase for most stars, nuclear fusion of 4 hydrogen atoms to…

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Chemistry Review of Substances and Mixtures
Chemistry Review of Substances and Mixtures 150 150 Deborah

Overview Substances occur in elements or compounds, while mixtures can be any combination of one or more elements or compounds. Mixtures may occur as solutions or heterogeneous combinations. Elements and…

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A Chemistry Review of Gold
A Chemistry Review of Gold 150 150 Deborah

Overview The element gold (Au) has atomic number 79. It is a soft yellow metal, with the properties of metals. It doesn’t react with other elements easily, but forms alloys…

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Review of Alchemy to Chemistry
Review of Alchemy to Chemistry 150 150 Deborah

Overview Before there was a science of chemistry, there was alchemy. It was practiced in China, India, Mesopotamia, and Europe. The alchemists from ancient times performed experiments to transform base…

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Chemistry Review of the Heaviest Elements
Chemistry Review of the Heaviest Elements 150 150 Deborah

Overview Over the centuries, the number of elements has changed as new elements have been discovered.  Some unstable, heavy elements  have only been synthesized in atomic laboratories, so very little is known…

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