Question

Complete the table: symbols elements
chemical formula subscripts number of
NaHCO3 atoms
H2SO4
Fe2O3
CH4

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Answer 1

Answer:

(I) NAHCO3/ symbol/ Sodium bicarbonate( element)/one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms(atoms)/sodium,hydrogen,carbon,oxygen(subscripts)

(ii)symbol/sulphuric acid( element)/And the shortened expression of a compound is called “formula”. Symbol is used in case of atom or an element. So the formula of sulfuric acid is H2SO4. The 2 is written as a subscript of H and 4 as a subscript of O(subscript)/two hydrogen atom, one sulfer atom, and four oxygen atoms(atom)