Chemical formula of a compound is a symbolic representation of its composition. We should know the following points to write the chemical formulae of chemical compounds:
$(i)$ Symbols of the combining elements.
$(ii)$ Valency of the combining elements.
In order to know the valency,we must calculate the valence electrons present in the atoms.
The electrons present in the outermost shell or valence shell are called valence electrons. The number of electrons in the atoms of some elements are given below. The elements which have one valency are called monovalent.
$(a)$ What is a chemical formula?
$(b)$ Which main points we must know to write the chemical formula of compounds?
$(c)$ Which values do we find associated with the use of formula for various things in daily life?
$(i)$ Symbols of the combining elements.
$(ii)$ Valency of the combining elements.
In order to know the valency,we must calculate the valence electrons present in the atoms.
The electrons present in the outermost shell or valence shell are called valence electrons. The number of electrons in the atoms of some elements are given below. The elements which have one valency are called monovalent.
$(a)$ What is a chemical formula?
$(b)$ Which main points we must know to write the chemical formula of compounds?
$(c)$ Which values do we find associated with the use of formula for various things in daily life?
(A) chemical formula of a compound is a symbolic representation of its composition.
$(b)$ To write the chemical formula of compounds,we must know the symbols of the combining elements and the valency of the combining elements.
$(c)$ The use of formulas is not confined only to chemistry. The use of various formulas and ideas helps us in finding solutions to many complicated problems in daily life. It helps in saving time,money,and energy. It brings simplicity to our work,and by following similar lines or suggestions provided by others,we find an easy,systematic,and valuable approach to overcome the challenges of life.
$(b)$ To write the chemical formula of compounds,we must know the symbols of the combining elements and the valency of the combining elements.
$(c)$ The use of formulas is not confined only to chemistry. The use of various formulas and ideas helps us in finding solutions to many complicated problems in daily life. It helps in saving time,money,and energy. It brings simplicity to our work,and by following similar lines or suggestions provided by others,we find an easy,systematic,and valuable approach to overcome the challenges of life.
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$(ii)$ Magnesium chloride
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$(a)$ Copper $(II)$ bromide
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$(a)$ Cobalt $CO$
$(b)$ Carbon $c$
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$(d)$ Helium $He$
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$(iii)$ Copper nitrate
$(iv)$ Aluminium chloride
$(v)$ Calcium carbonate.
$(i)$ Magnesium chloride
$(ii)$ Calcium oxide
$(iii)$ Copper nitrate
$(iv)$ Aluminium chloride
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