Electron capture occurs more often than positron emission in heavy elements.
Heavy elements exhibit radioactivity.

Assertion: Electron capture occurs more often than positron emission in heavy elements. Reason: Heavy elements exibits radioactivity.

Assertion : Electron capture occurs more often than positron emission in heavy elements. Reason : Heavy elements exhibit radio activity.

Which of the following is/are correct ? (I) Density of all the nuclei is same. (II) Heavy elements exhibit radioactivity. (III) Amongst alpha, beta and gamma rays, alpha -particle has minimum penetrating power. (IV) Isobars are the atoms of same elements having the different mass number.

Heavy metals are defined as elements with density