Write the formula of sulphide of an element C, whose atomic number is 5.(C is not the actual symbol of the element)
Question
Write the formula of sulphide of an element C, whose atomic number is 5.
(C is not the actual symbol of the element)
Solution
Step 1: Identify the element with atomic number 5.
The element with atomic number 5 is Boron.
Step 2: Determine the valency of the element.
Boron is in group 13 of the periodic table and has a valency of 3.
Step 3: Determine the valency of sulphide.
Sulphide has a valency of 2.
Step 4: Write the formula.
When writing the formula, the valency of one element becomes the subscript of the other. Therefore, the formula for the sulphide of Boron (element C) is B2S3.
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