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Chemistry terms and meanings continued…….. f subshell – A subshell that corresponds to the angular momentum quantum number l = 3, found in the fourth and higher principal energy levels. Each contains seven orbitals. f orbital – A f orbital corresponds to an electron orbital with angular momentum quantum number l = 3. face-centered cubic – A crystal unit cell that is cubic […]
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Chemistry, SS 2 Week: 1 Topic: Introduction to Organic Chemistry Organic chemistry originally meant the chemistry of compounds obtainable from plants and animals – living organisms. Organic chemistry is that branch of chemistry that deals with the structure, properties, and reactions of compounds that contain carbon. In other word, organic chemistry is defined as the
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Introduction Electrochemistry is the study of electricity and how it relates to chemical reactions. In electrochemistry, electricity can be generated by movements of electrons from one element to another in a reaction known as redox reaction, or oxidation-reduction reaction. In other word, electrochemistry is the study of changes that cause electrons to move. This movement
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Chemistry SS 3 Week 6 Topic: Alloy Introduction Many of the pure metals are not widely used because of their properties such as hardness, tensile strength, resistance to corrosion and lustre can be improved by combining them with other element. The mixtures are known as alloys. An alloy is a mixture of two or more
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If you are observant, you would have come across the word STEM; be it on radio, TV or the internet. What exactly is it? Why is it everyone talking about it? Why is is so important for students? And how can they be successful at it. Put simply, STEM means Science, Technology, Engineering and Mathematics.
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Introduction The most important classification in chemistry is the arrangement of the elements in the periodic table. In 1869, Mendeleev, a Russian scientist, was the first to construct a periodic table. He arranged the elements in order of increasing relative atomic mass. He pointed out that elements with similar properties kept recurring at regular intervals
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Chemistry SS 2 Week 1 Topic: Halogens Introduction The halogens are the collective name given to the elements in group VII of the Periodic Table. There are five halogens; fluorine, chlorine, bromine, iodine and astatine. Astatine is very radioactive and cannot exist for more than a few microseconds before decaying. We will thus be concerned
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Bleach is the common name for a solution of 2.5% sodium hypochlorite in water. It’s also called chlorine bleach or liquid bleach, and another type of bleach is oxygen-based or peroxide bleach. While you may know bleach is used to disinfect and remove stains, there is more to know about this everyday chemical to use
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Chemistry SS 2 Week 6 Topic: Oxides of Nitrogen Types of Nitrogen Oxides Oxides of nitrogen provide a fascinating picture from the point of view of their varied structures and diverse chemical behaviour. They range from N2O (oxidation state of nitrogen +1) through NO, N2O3, NO2, N2O4 to N2O5 in which the oxidation state of
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Continuation of Chemistry terms, Letters D and E…… D Dative Bond – A dative bond is a covalent bond between two atoms where one of the atoms provides both electrons that form the bond. Decantation – Decantation is a process to separate mixtures. Decanting is done to separate particulates from a liquid by allowing the
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