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7.Teatomicmasses...
...
...
.elementsaredeterminedrelative...
...
...
.thevalue
...
...
...
.12.00000,i.e.themass...
...
...
.onecarbonisotope.
8.TepredictionsofMendeleevcametrue...
...
...
.thefollowingdozenyears.
9.Allelementsarearranged...
...
...
.theperiodictableaccording...
...
...
.their
increasingmass.
10.Chemicalnamesofelementsaredesignated...
...
...
.theirLatinnames,e.g.symbol
Agstands...
...
...
.Argentum(silver).
Task10
Canyoulabelthediagrambelow?
Remark:
Beforeyoustartcompletingtheexercisesbelow,checkthepronunciationofthenamesof
elements!SeeTable2b,p.30.
Task11
Belowthereisatableofsomeelements.Teelementsarearrangedinhorizontal
rowsandverticalcolumns.
25
26
27
28
29
30
31
32
33
34
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
54.938
43
Tc
55.847
44
58.933
45
58.693
46
63.546
47
65.39
48
69.723
49
72.61
50
74.922
51
78.96
52
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
(97.91)
75
101.07
76
Re
Os
102.91
77
106.42
78
107.87
79
112.41
80
114.82
81
118.71
82
121.76
83
127.6
84
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
186.21
190.23
192.22
195.08
196.97
200.59
204.38
207.2
208.98
(209)
A.Giveyourfriendthepositionsofthefollowingelementsinrelationtothe
wholetable:1)iron,2)tin,3)zinc,4)gold,5)antimony,6)polonium.
Examples:1.Iridiumisatthebottom,ontheleft.
2.Nickelisinthefourthcolumnfromtheleft,atthetop.
3.Copperisinthetoprow,nearthemiddle.
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