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The strength of an acid or base in a solution is measured

on a scale called a pH scale. The pH scale is a measure of the

hydrogen ion concentration. A base is a substance that is slippery

to the touch and tastes bitter. An acid is a chemical substance

whose solutions are characterized by a sour taste and have the

ability to turn blue litmus red.

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The strengths and weaknesses of acids and bases - George Zaidan and Charles Morton

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View full lesson: http://ed.ted.com/lessons/the-strengths-and-weaknesses-of-acids-and-bases-george-zaidan-and-charles-morton Vinegar may have a powerful smell, but did you know it's actually a weak acid? In the chemical economy, acids actively give away their protons while bases actively collect them -- but some more aggressively than others. George Zaidan and Charles Morton use the currency of subatomic particles to explain this unseen exchange.

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A buffer is a solution that can resist pH change

upon the addition of an acidic or basic components.

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A solution is a mixture in which other substances (solutes) are dissolved. S uspension is a mixture of liquids with particles of a solid which may not dissolve in the liquid.

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Heat capacity, or thermal capacity, is a measurable physical quantity; it's the ratio of the heat added to an object to the resulting temperature change

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Simple science experiment, which shows that water is able to absorb much more heat comparing to air.

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Cohesionis the property of like molecules (of the same substance) to stick to each other due to mutual attraction. Adhesion is the property of different molecules or surfaces to cling to each other.

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Having two opposite electrical charges.

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The electromagnetic attractive interaction between

polar molecules, , in which hydrogen is bonded to a highly

electronegative atom, such as nitrogen, oxygen, or Fluorine.

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This is a simple language explanation of hydrogen bonding

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Van der Waals forces include attractions and repulsions between atoms, molecules, and surfaces.

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An attraction between atoms that allows the

formation of chemical substances

that contain two or more atoms. Opposite

charges attract.

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Chemical Bonding- Ionic vs. Covalent bonds

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Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons

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This two minute video explains what isotopes are, using Carbon-12, Carbon-13 and Carbon-14 as examples. Find more free tutorials, videos and readings for the science classroom at ricochetscience.com

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Atomic number is the number of protons

in the nucleus of an atom. Mass number is the

total number of protons and

neutrons in a nucleus.

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Atomic number and Mass number of an atom - Science

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This is a science video for grade 8-9th students that explains Atomic Number and Mass Number of an atom and how they are linked to the electrons, protons and neutrons of an atom.

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Protons and Neutrons are found inside

of the Nucleus and Electrons are found

orbiting the nucleus.

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What's in an atom?  Protons, Neutrons, Electrons

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More free chemistry help videos: http://www.chemistnate.com What's inside of an atom? The answer is protons and neutrons (which together make the nucleus), and electrons (which are found in the empty space around the nucleus). The number of protons determines which element it is.