Read the assertin and reason carefully to mark the correct option out of the options given
Assertion : Radium is most abundeant s-block element.
Reason : s-block elements are non-radioactive in nature.
| A. |
If both assertion and reason are true and the reason is the correct explanation of the assertion |
| B. |
If both assertion and reason are true but the reason is not the correct explanation of the assertion |
| C. |
If assertion is true but reason is false |
| D. |
If bot assertion and reason are false. |
 |
Both assertion and reason are false. Radium is the rarest of all s-block elements comprising only `10^(–10)` percent of igneous rocks. Francium (s-block member) is radioactive; is long lived isotope. `{::}_( ^223Fr` has a half life of only 21 minutes.