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Question
What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
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Solution
- Common salt is mostly sodium chloride. The ionic compound with the formula NaCl, representing equal proportions of sodium and chlorine.
- Elements present is common salt: Sodium & Chlorine.
- Formula of common salt: NaCl Atomic number and mass number of NaCl:
Atomic number of Na = 1 Atomic number of Cl = 17 Mass number of Na = 23
Mass number of Cl = 35 - Ions present in the compound :
Sodium ion Na+ and Chloride ion Cl
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