Question

Sonya is studying a nonmetal element. She learns that the element is like other elements in its group because it can bond to form a salt or an acid. She also learns that the element is the most reactive element in its group. Which element is Sonya most likely studying?

Answer 1

She is studying Fluorine. it is the most active element on the periodic table.

Answer 2

Answer is: fluorine (F).

Group 17 (halogens) elements: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I). They are very reactive and easily form many compounds.  

Halogens need to gain one electron to have electron cofiguration like next to it noble gas.  

Fluorine has atomic number 9, it means it has 9 protons and 9 electrons.

Fluorine tends to have eight electrons in outer shell like neon (noble gas) and gains one electron in chemical reaction.  Fluorine is most reactive nonmetal.

Electron configuration of fluorine: ₉F 1s² 2s² 2p⁵.  

Electron configuration of neon: ₁₀Ne 1s² 2s² 2p⁶.