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प्रश्न
What are (i) ionic compounds, and (ii) molecular compounds ? Give two examples of each type of compounds.
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उत्तर
Ionic Compounds: Ionic compounds that consist of oppositely-charged ions held together by strong electrostatic forces. In an ionic compound, positively-charged ions, cations, and negatively-charged ions, anions, are chemically bonded by ionic bonds.
Examples of ionic compounds: NaCl – It comprises positively-charged sodium ions chemically bonded to the negatively-charged chloride ions.
Similarly, CuSO4 comprises positively-charged copper ions chemically bonded to the negatively-charged sulphate ions.
Molecular compounds: Molecular compounds consist of molecules of two or more elements that are chemically bonded. Molecular compounds are made up of electrically-neutral molecules and not electrically-charged ions.
Examples of molecular compounds: SO2 – It consists of electrically-neutral sulphur chemically bonded to two atoms of oxygen.
Similarly, NH3 consists of electrically-neutral nitrogen atom chemically bonded to three atoms of hydrogen.
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संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
CaCl2
Give the name of the element present in the following compound:
Baking powder
What do the following denote ?
- N
- 2N
- N2
- 2N2
Work out the formula for magnesium hydrogencarbonate.
Molecular compounds are usually formed by the combination between :
Calculate the mass of 3.011 × 1024 atoms of carbon.
Why are the symbols and formulae of substances important?
State the atomicity of the following:
Argon
Two elements sometimes can form more than one compound.
Write any two classifications of a molecule.
