By Martin Silberberg
Via Libby Weberg: This necessary ancillary is designed that can assist you realize your studying kind; know how to learn, classify, and create a problem-solving record; and perform problem-solving talents. for every portion of a bankruptcy, the writer presents examine goals and a precis of the corresponding textual content. Following the precis are pattern issues of designated ideas. each one bankruptcy has true-false questions and a self-test, with all solutions supplied on the finish of the chapter..
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Extra info for Student Study Guide to accompany Principles of General Chemistry
The mass of a n ord i nary hyd rogen ato m (a p roto n ) is 1 . 007825, and the mass of a n eutron is 1 . 008665 . The loss of mass acco m panyi n g the fo rmation of a heavier ato m from hydrogen atoms and n e u trons is d u e to the very large a m o u n t of e n e rgy that is evolved i n the formation of heavier ato ms, an amou nt g iven by Ei nste i n ' s equatio n , E m cf . This decrease i n mass is descri bed by a q u antity called the packing fraction. = Most naturally occ u rring hyd rog e n ato ms (99 .
The s mall n u mber of hyd rogen ato m s contai n i n g a n e u tron causes the average mass of natu ral ly occ u rring hydrogen ato ms to be slig htly g reater than 1 . 00794 am u . 6 T H E P E R I O DI C TAB L E The Components of Matter I n 1 87 1 , D m itri Mendeleev organ ized the e leme nts b y i ncreas ing ato mic mass a n d arranged the m so that elements with s i m i lar chem ical properties would lie i n the same co l u m n . The modern period ic table of the e leme nts is based on Mendeleev's earlier versio n .
It contai ns proto ns ( p+) with a positive charg e , and ne utrons (nO) with no ch arge. The proto n s and neutron s acco unt for esse ntial ly al l the mass of the ato m . An ato m is e lectrically neutra l , so the n u mber of protons and electro n s in an ato m are equal . The Ato m i c Theory Today 1. All m atter is composed of ato ms. Although ato ms are com posed of smaller particles (electro n s , proto n s , and neutrons) , an ato m is the small est body that retains the chemical and physical properties of the e lement.