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Anatomy & Physiology - part 3

Để làm cho sự hiểu biết của bạn hóa học dễ dàng hơn, nó là tốt nhất để phát triển một sự hiểu biết về cách sử dụng các bảng định kỳ (xem Hình 2-1). Biết làm thế nào để đọc bảng định kỳ sẽ cung cấp các con đường rất nhiều sự hiểu biết về hóa học. | 66 CliffsStudySolver Anatomy Physiology The Periodic Table To make your understanding of chemistry easier it is best to develop an understanding of how to use the Periodic Table see Figure 2-1 . Knowing how to read the Periodic Table will provide numerous avenues to the understanding of chemistry. The Periodic Table was designed in such a manner so that the atoms in the first column have some common characteristics and the atoms in the second column also have some things in common but yet are different than the atoms in column one. For example all the atoms in the same column as hydrogen H will develop a positive one charge when they become ions. Once they become ions they will be written in this manner H1 Na1 and so on. All the atoms in the same column as beryllium Be will develop a positive two charge when they become ions. Once they become ions they will be written in this manner Be2 Ca2 and so on. All the atoms in the same column as boron B will develop a positive three charge. The atoms in the column with nitrogen N will develop a negative three charge the column with oxygen O will develop a negative two charge and the column with fluorine F will develop a negative one charge. The transition elements Sc through Zn don t seem to have a nice pattern and those in the very last column with helium He do not become ions. Keep in mind that there are exceptions. 1 . ỊÍ Hydrogen 1.00797 PERIODIC TABLE OF THE ELEMENTS 2 He Helium 4.0026 3 Li Lithium 6.939 4 Be Beryllium 9.0122 5 B Boran 10.811 6 0 Cartoon 12.01115 7 N Nitrogen 14.0067 8 0 Oxygen 15.9994 9 _F Routine 18.9984 10 Ne Neon 20.183 11 Na Sodium 22.9898 12 Mg Magnesium 24.312 13 Al Aluminum 26.9815 14 Si Silicon 26.086 15 _ p Phosphorus 30.9738 16 s Sulfttr 32.064 17 Cl Chlorine 35.453 18 Ar 39.948 19 _ K Potassium 39.102 20 _Ca Calcium 40.08 21 Sc Scandium 44.956 22 _Ti Titanium 47.90 23 . V Vanadium 50.942 24 Or Chromium 51.996 25 Mn Manganese 54.9380 26 Fe Iron 55.847 27 Co Cobatt 58.9332 28 Ni Nickel 58.71