Maharashtra State PSC Model Paper 1

The correct answer is Halogens.

• The Halogens are a group of six elements of Group 17 in the periodic table.
  • Fluorine (F)
  • Chlorine (Cl)
  • Bromine (Br)
  • Iodine (I)
  • Astatine (At)
  • Tennessine (Ts)
• Halogens are nonmetals.
• Halogens are very reactive, the reactivity decreases from Fluorine to Astatine.
• Physical Properties of Halogens:
  • They have a strong and often nasty smell.
  • They are extremely toxic.
  • They are poor conductors of heat and electricity.
  • They have low melting and boiling points.
• Chemical Properties of Halogens:
  • Their Molecules are diatomic.
  • They have seven valence electrons as their one electron missing, they form negative ions and are highly reactive.
  • They can gain an electron by reacting with atoms of other elements.