Which best describes the definition of lewis acids and bases?

Explanation:

According to Lewis, acids are the species that are able to accept an electron pair from a base or electron donating specie.

For example, is a lewis acid as it is able to accept an electron.

On the other hand, a Lewis base is defined as the species that are able to donate an electron pair.

For example, is a lewis base as it can donate a pair of electron to an electron deficient atom.

beta decay is the answer

"the periodic table is arranged in order of atomic number."