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2 How to Read the Periodic Table February 18, 2014.
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5 is the number of protons in an atom
6 is the number of protons in an atom atomic number increases by 1 with each consecutive element
7 is the number of protons in an atom atomic number increases by 1 with each consecutive element this is also the number of electrons in the atom (when it is NOT an ion)
8
9 the average mass of every atom of that element
10 the average mass of every atom of that element unit: atomic mass units (amu)
11 the average mass of every atom of that element unit: atomic mass units (amu) the mass is relative to hydrogen
12 the average mass of every atom of that element unit: atomic mass units (amu) the mass is relative to hydrogen always expressed as decimal fractions
13 the average mass of every atom of that element unit: atomic mass units (amu) the mass is relative to hydrogen always expressed as decimal fractions generally increases in order of atomic number
14 the average mass of every atom of that element unit: atomic mass units (amu) the mass is relative to hydrogen always expressed as decimal fractions generally increases in order of atomic number it is equal to the protons + the neutrons
15
16 the electric charge that an atom takes on when it loses or gains electrons
17 the electric charge that an atom takes on when it loses or gains electrons an atom that has lost or gained electrons is called an ion
18 the electric charge that an atom takes on when it loses or gains electrons an atom that has lost or gained electrons is called an ion elements with atoms that can form similar ions are grouped together in the periodic table
19 the electric charge that an atom takes on when it loses or gains electrons an atom that has lost or gained electrons is called an ion elements with atoms that can form similar ions are grouped together in the periodic table some elements do not form ions
20
21 the same set of symbols is used worldwide
22 the same set of symbols is used worldwide consists of one or two letters
23 the same set of symbols is used worldwide consists of one or two letters the second letter is not capitalized
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25 period: horizontal rows
26 period: horizontal rows group/families: vertical columns (there are 18)
27 period: horizontal rows group/families: vertical columns (there are 18) elements within a family share physical and chemical properties
28 period: horizontal rows group/families: vertical columns (there are 18) elements within a family share physical and chemical properties
29 period: horizontal rows group/families: vertical columns (there are 18) elements within a family share physical and chemical properties PERIOD
30 period: horizontal rows group/families: vertical columns (there are 18) elements within a family share physical and chemical properties PERIOD
31 period: horizontal rows group/families: vertical columns (there are 18) elements within a family share physical and chemical properties PERIOD GROUP
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33 12
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35
36
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41 lithium
42 lithium hydrogen
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45 Au Gold Au comes from the Latin aurum Atomic # 79 Atomic mass Uses: in coins, jewelry, dentistry, electrical parts that need to conduct electricity and as reflective coatings on the outside of large glass windows. Physical properties: - a metal - yellow colour - density: 19.3 g/cm 3 - MP: o C - BP: 2856 o C Chemical properties - does not react with water or air - reacts with chlorine and bromine and iodine - reacts with acids Who and where the first discovery of gold was made is unknown. It has been found in many places and is the cause of gold rushes throughout the world.
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