How many dots belong in the electron dot diagram of a boron (b) atom? a. three b. five c. eight d. thirteen

the answer is A. three

             Three dots belong in the electron dot diagram of a Boron.

                         In drawing Lewis structures the dots presented on the atoms are the valence electrons present in the valence shell of that particular atom. Therefore, the number of valence electrons in an atom can be calculated from its electronic configuration. In given case, the electronic configuration of Boron with atomic number 5 and number of electrons = 5 is as follow,

                                               1s², 2s², 2p¹

As the valence shell is 2 and there are three electrons present in it hence the following electron dot diagram for Boron can be drawn.