ATOMIC
ATOMIC
ELEMENT
SYMBOL
NUMBER
WEIGHT
* Sodium
Na
11
22.9898
* Strontium
Sr
38
87.62
* Sulfur
S
16
32.064
Tantalum
Ta
73
180.948
Technetium
Tc
43
99
Tellurium
Te
52
127.60
Terbium
Tb
65
158.924
Thallium
Tl
81
204.37
Thorium
Th
90
232.038
Thulium
Tm
69
168.934
Tin
Sn
50
118.69
Titanium
Ti
22
47.90
Tungsten
W
74
183.85
Uranium
U
92
238.03
Vanadium
V
23
50.942
Xenon
Xe
54
131.30
Ytterbium
Yb
70
173.04
Yttrium
Y
39
88.905
* Zinc
Zn
30
65.37
Zirconium
Zr
40
91.22
* Denotes elements most common to medicine.
Table 1-1. Elements, symbols, atomic numbers, and atomic
Weights in alphabetical order (concluded).
d. Classification of Mixed Matter. Matter that can be separated by physical
means is called mixed matter and may be homogeneous or heterogeneous.
(1) Homogeneous mixtures. Mixtures that are uniform throughout are called
homogeneous. An example of a homogeneous mixture is a solution of sugar in water.
Any small part of this solution would exhibit the same properties as any other small part;
therefore, it would be uniform throughout the mixture.
(2) Heterogeneous mixtures. Mixtures that are not uniform are called
heterogeneous. An example of a heterogeneous mixture is a mixture of water and oil.
If a small sample is taken, it may not be the same as another small sample taken from
elsewhere in the mixture. This is because oil and water do not mix well--they give a
nonuniform mixture.
MD0803
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