Polarity of molecules

• Polar covalent bonds are formed when electrons are shared unequally between atoms.
• Water is an example of a polar molecule due to its bent shape and unequal sharing of electrons between oxygen and hydrogen atoms.
• The poles of polar molecules have different charges, with one end being positive (δ+) and the other negative (δ-).
• Nonpolar molecules do not have any partial charge on their ends as they share electrons equally among all atoms.
• VSEPR theory predicts molecular shapes based on electron pairs surrounding a central atom.
• Nonpolar molecules do not have any partial charge on their ends.
• Linus pauling - Original scientist to describe the phenomenon of electronegativity
• Dipole moment refers to the separation of electrically charged particles within a molecule or ion.
• Covalent bond - Bond that shared electrons with non metal
• Which member of the alkaline metals has the highest electronegativity?
• Which of the following molecules is polar?

  A.CF4

  B. CHF3

  C. CCI2

  D. CCI4
• Which substance would form a triple bond when bonded covalently?A.Fluorine

  B. Nitrogen

  C. Oxygen

  D. Water
• Compared with halogens, an alkali metal in the same period has___ electronegativity.

  A.better

  B. larger

  C. same

  D.Smaller
• Arrange the following elements from highest to lowest electronegativity- K, Sc, Ca, Zn, Br.

  A.Sc, K, Br, Zn, Ca

  B. Br, Zn, Sc, Ca, K

  C.Ca, Zn, Br, K, Sc

  D.K, Ca, Sc, Zn, Br
• Who calculated the electronegativity values?

  A.Bohr

  B.Paul

  C.Pauling

  D.Zeeman
• What elements have zero electronegativity by looking at the periodic table?Noble gases
• Which element is more likely to give up an electron between bromine and radium?

  Radium
• What is the EN difference between carbon and oxygen?

  1