By Peter J. Mikulecky, Katherine Brutlag, Michelle Rose Gilman, Brian Peterson
From beverages and solids to acids and bases - paintings chemistry equations and use formulation with ease
Got a take hold of at the chemistry phrases and ideas you want to be aware of, yet wander off midway via an issue or, worse but, no longer understand the place to start? haven't any worry - this hands-on consultant is helping you resolve many varieties of chemistry difficulties in a centred, step by step demeanour. With problem-solving shortcuts and plenty of perform workouts, you'll construct your chemistry talents and enhance your functionality either out and in of the technology lab. You'll see easy methods to paintings with numbers, atoms, and parts; make and remake compounds; comprehend adjustments by way of strength; make feel of natural chemistry; and more!
100s of Problems!* comprehend the place to start and the way to resolve the commonest chemistry difficulties* step by step resolution units truly establish the place you went improper (or correct) with an issue* comprehend the most important exceptions to chemistry principles* Use chemistry in functional purposes with confidence
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Additional info for Chemistry Workbook For Dummies
Thomson’s model was as important to chemistry as the dessert is foul tasting. Thomson, like all chemists of his day, knew that two negative charges repel one another, so he pictured the atom as a collection of evenly spaced, negatively charged particles. Thomson called these charges corpuscles, but Thomson’s corpuscles have subsequently been awarded the much nicer name electrons. Thomson also knew that the atom was electrically neutral (meaning it has zero overall charge), so he figured the atom must also contain an amount of positive charge equal to the negative charge of the electrons.
Liquids occupy the middle ground. In chemistry, discussions of temperature often refer to the Kelvin scale, which you may not have previously encountered. Boldly, the Kelvin scale sets its zero at a very extreme condition, called absolute zero. There is indeed something very absolute about this zero, because it’s the temperature at which all particles freeze, ceasing all movement. Absolute zero is the lowest possible temperature, representing the complete absence of heat. It’s as low as you can possibly go.
So, how can you have a fractional number of protons or neutrons? 25 neutron. Your chemist’s sense of meticulousness has been offended, and you demand answers. As it turns out, most elements come in several different varieties, called isotopes. Isotopes are atoms of the same element that have different mass numbers; the differences in mass number arise from different numbers of neutrons. The messy looking numbers with all those decimal places are atomic masses. An atomic mass is a weighted average of the masses of all the naturally occurring isotopes of an element.