Write the symbols of the positive ion (cation) and negative ion (anion) side by side: SO4SO sub 4 Write their respective valencies below them: Interchange (criss-cross) the valencies. The final formula is: . Textual Question 3: Distinguishing Concepts
This chapter covers solutions (saturated, unsaturated, supersaturated), solubility curves, and types of water (soft vs. hard). viraf j dalal chemistry class 8 icse solutions
Electrons (negative), Protons (positive), Neutrons (neutral). Atomic Number ( ): Number of protons in an atom. Mass Number ( ): Sum of protons and neutrons. Electronic Configuration: Arranging electrons in shells ( 2n22 n squared Chapter 5: Language of Chemistry Write the symbols of the positive ion (cation)
Ans: | Physical Change | Chemical Change | | :--- | :--- | | No new substance is formed. | New substances with different properties are formed. | | It is generally reversible. | It is generally irreversible. | | No change in mass or composition. | Mass and composition change. | | Example: Melting of wax. | Example: Burning of wax. | Mass Number ( ): Sum of protons and neutrons
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