Question

Chlorine is the most electronegative of all elements.

• A. True
• B. False

Answer 1

The correct option is B False

Concept:

1. Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself.
2. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element.
3. Fluorine (F) is the first element in the Halogen group (group 17) in the periodic table. Its atomic number is 9 and its atomic weight is 19
4. A fluorine atom needs one electron to fill its outer electron shell and achieve stability, which is why free fluorine exists as the F^- ion.
5. In the chlorine case, the bonding pair will be shielded by all the 1- subshell and 2-subshell electrons. The 17 protons on the nucleus will be shielded by a total of 10 electrons, giving a net pull from the chlorine of about 7+.
6. That is the same as the pull from the fluorine, but with chlorine the bonding pair starts off further away from the nucleus because it is in the 3-subshell Since it is further away, it feels the pull from the nucleus less strongly.
7. The electronegativity of an atom is affected by both its atomic number and the distance between its valence electrons and the charged nucleus. The higher the associated electronegativity, the more electrons an atom or substituent group attracts.

so the given statement is False