How to write chemical formulas by using criss cross methods explain me step by step. WITH EXAMPLES PLZ..
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STEP 1: Write the symbols, with the metal first.
Ca I
STEP 2: Write the ionic charge above each symbol to indicate the stable ion that each
element forms.
Ca2+ I
1-
STEP 3: Determine how many ions of each type you need so that the total ionic charge is
ZERO.
_____(+2) + ____ (-1) = 0
1 (+2) + 2 (-1) = 0
(+2) + (-2) = 0
STEP 4: Write the formula using subscripts to indicate the number of ions of each type.
CaI2 *NOTE: the subscript “1” is unnecessary because the symbol
itself represents ONE atom/ion
Ca I
STEP 2: Write the ionic charge above each symbol to indicate the stable ion that each
element forms.
Ca2+ I
1-
STEP 3: Determine how many ions of each type you need so that the total ionic charge is
ZERO.
_____(+2) + ____ (-1) = 0
1 (+2) + 2 (-1) = 0
(+2) + (-2) = 0
STEP 4: Write the formula using subscripts to indicate the number of ions of each type.
CaI2 *NOTE: the subscript “1” is unnecessary because the symbol
itself represents ONE atom/ion
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Similar questions
In order for these two polyatomic ions to bond the charges must be equal and opposite. Therefore, it will take two +1 ammonium ions to balance the one -2 sulfate ion. This will make the formula for Ammonium Sulfate (NH4)2SO4.
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