2. Look at the chemical formula of a compound below. Use the periodic table to
answer the following question.
NH4
Which elements are found in this compound? (6.5A)
F. Nitrogen and Hydrogen
G. Nitrogen and Helium
H. Nickel and Hydrogen
J. Nickel and Helium
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Ответ:
it supports the central idea which is the main cause of the authors writing or scripting it also affects it so that the people can get to know more about the particular book and makes us know about the central theme or climax