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Answer 1

1. carbon disulfide (cs2) also called carbon bisulfide ,a colour less ,toxic, chemical compound, large amounts of which are used in the manufacture of viscose rayon e.t.c.
2. Godlewski (RaCl2) ,a polish chemist from Krakow and is historically known as actinium x or Acx.
3. hydrogen cyanide (HCN), sometimes called prussic acid, is a chemical compound with a chemical formula HCN.
4. Fluorine (F2) is the chemical element in the periodic table that has the symbol (F) and atomic number 9