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प्रश्न
Write the formula of the following compound:
Iron [II] oxide
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उत्तर
Iron [II] oxide - FeO - Fe2+O2-
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संबंधित प्रश्न
Write down the formulae for the following compounds :
Magnesium hydroxide
An element Z has a valency of 3. What is the formula of oxide of Z ?
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
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If the valency of carbon is 4 and that of sulphur is 2, work out the formula of the compound formed by the combination of carbon with sulphur. What is the name of this compound ?
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An element X of valency 3 combines with another element Y of valency 2. What will be the formula of the compound formed ?
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Write the formula of the following compound:
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Write the formula of the following compound:
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Write the formula of the following compound:
Calcium chloride
Write the formula of the following compound:
Calcium hydroxide
Write the formula of the following compound:
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Write the formula of the following compound:
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Write the formula of the following compound:
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Write the formula of the following compound:
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Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
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Derive the chemical formula for calcium chloride.
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
