Physical Science

Changing the colors of a fire, or causing the fire to suddenly send out sparks of gold or silver is an old trick. This trick has been used to scare people, emphasis a point, or just for fun. The secret…
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A lot of kids enjoy learning about science and the world around them. If they enjoy the field of chemistry in particular, then you can get them a gift related to this fascinating subject for Christmas of 2010. Try one…
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Atomic weight refers to the mass of an average atom of a particular element. This weight is calculated by adding together the number of protons and neutrons in the average nucleus (electrons, which also form an atom, are of extremely…
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Hydrogen peroxide is a strong oxidant with many valuable uses across a broad range of applications. The bleaching properties of hydrogen peroxide make it a useful tool to remove colour from wood pulp and textiles, whilst the fact that it…
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Argon is an element and a  noble gas, difficult to make into and keep as a liquid.  Saying something is a “Noble Gas” means that it is almost always a vapor, “stands alone” and mixes with very little else, and…
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Benzoyl peroxide has the chemical formula C14H10O4, and can be envisioned as a pair of benzoic acid molecules, joined together at the oxygen atoms from which the acidic hydrogen atoms are missing.  Benzoyl peroxide belongs to the general class of…
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Noise is an electrical signal that produces an acoustic sound. Colors are assigned to noise and are matched up based, loosely, on the correlations between the sound wave frequency and the color light wave frequency. Sounds are separated from one…
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Bismuth (atomic symbol Bi) is in group 15 and period 6 of the periodic table and is classified as one of the “other metals” along with aluminum, gallium, indium, tin, thallium and lead. Bismuth was actually believed to be a…
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Lead is classified as one of the “other metals.” All of the other metals have qualities of malleability and ductility. They are similar to the transition elements, but do not have varying oxidation states, and their valence electrons only exist…
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Containing just a single valence electron, and located in Group 1 elements of the periodic table, Lithium is the lightest of all metals. it is generally classified as an alkali metal: this means that it is soft, malleable, ductile, extremely reactive, and a good…
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