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It then treats electromagnetic waves , including separate coverage of light waves ; the focussing and imaging of waves ; and sound waves . Section 121. Chemical elements : periodic variation in their ...
The carbon group of the elements , or the Group IVa elements of the periodic table CARBON GROUP ELEMENTS AND THEIR COMPOUNDS 3 : 838-852 3 : 839f - 845a 3 : 8399-841a 16 : 524f - g a . Comparative chemistry of the carbon group elements ...
The halogen elements , or the Group VIIa elements of the periodic table HALOGEN ELEMENTS AND THEIR COMPOUNDS 8 : 560–575 8 : 561c - 563d 13 : 683d - 685c a . Comparative chemistry of the halogen elements b . Individual halogen elements ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review
atomic nuclei and elementary particles
Energy radiation and the states and transformation of matter
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