Chemistry
Assertion (A): Al3+ ion is isoelectronic with Neon.
Reason (R): Both have the same number of electrons.
- 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.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Aluminium (Al) has electronic configuration 2, 8, 3. Al3+ is formed when Aluminium loses 3 electrons making its electronic configuration 2, 8. The electronic configuration of neon is also 2, 8. So, Al3+ and Ne have the same number of electrons i.e., they are isoelectronic. Hence both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Related Questions
Assertion (A): An alpha particle is the same as a Helium nucleus.
Reason (R): An alpha particle does not have any electron.
- 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.
Assertion (A): Isotopes of an element have similar chemical properties.
Reason (R): Isotopes of an element have the same atomic number.
- 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.
Assertion (A): Neon is a noble gas.
Reason (R): Neon is not very reactive due to its small size.
- 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.
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.