Question

Name the following:

A non-metal which has three electrons in its outermost shell.

Answer 1

• Modern periodic table is the arrangement of elements on the basis of increasing atomic number in 7 horizontal rows and 18 vertical columns. Horizontal rows are termed as Periods while the vertical columns are termed as Groups.
• Valence electrons of any element are defined as the number of electrons present in the outermost shell of any element.
• Valence electrons in any element can be predicted by their group number. For example, elements in Group 1 have 1 valence electron.
• Elements present in Group 13 have three valence electrons.
• Among Group 13 elements, Boron (B) is a nonmetal.
• $$\begin{gathered} \mathrm{Group}13 \\ \mathrm{Period}\left(\mathrm{second}\right)\mathrm{Boron}\left(\mathrm{B}\right) \\ \mathrm{Electronic}2,3 \\ \mathrm{Configuration} \end{gathered}$$
• Thus, the nonmetal which has three electrons in its outermost shell is Boron.