What happens to the mass number and the atomic number of the original radioactive unstable element when it undergoes beta decay

Atomic Mass remains constant

Atomic no. increases or decreases by 1

Explanation:

Due to emission of positive beta atomic no. decreases by 1

Due to emission of negative beta atomic no. increases by 1

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.