ICSE Class 9 Chemistry
Question 34 of 39
Atomic Structure and Chemical Bonding — Question 24
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Question Assertion (A): The properties of an ion are different from that of the parent atom.
Reason (R): Atoms and ions differ with respect to the number of neutrons and protons in them.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
A is true but R is false.
Explanation — When an atom changes into an ion, its electrical charge changes, affecting its conductivity, ionic radius, and other physical and chemical characteristics. Hence the assertion (A) is true.
When an atom changes to ion, number of protons and number of neutrons remain same. But number of electrons change. It will either increase or decrease. Hence reason (R) is false.