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प्रश्न
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उत्तर
Potassium carbonate - K2CO3 - `"K"^1"CO"_3^(2-)`
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संबंधित प्रश्न
Write the chemical formula of the Calcium carbonate.
The radius of an oxygen atom is 0.073 nm. What does the symbol ‘nm’ represent ?
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
What is meant by the symbol of an element ? Explain with examples.
What do the symbols, H2, S and O4 mean in the formula H2SO4 ?
Write the formula of the following compound:
Potassium permanganate
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Calcium sulphite
Write the formula of the following compound:
Magnesium bicarbonate
Write the formula of the following compound:
Copper [I] sulphide
Write the formula of the following compound:
Iron [II] oxide
Write the formula of the following compound:
Iron [III] oxide
Define the term Relative atomic mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)3
What do you understand by chemical formula of a compound? What is its significance?
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
Write the molecular formulae for the following compounds
Calcium (II) phosphate
Write the molecular formulae for the following compounds
Magnesium (II) acetate
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
