electronegativity

Question 1

give the definition of electronegativity ?

Answer 1

the power of an atom to attract the electron density in a covalent bond towards itself .

Question 2

what is electron density used to describe ?

Answer 2

the way negative charge is distrusted in a molecule

Question 3

what is used to measure electronegativity ?

Answer 3

the pauling scale

Question 4

what does the pauling scale run from , what do the numbers ,mean ?

Answer 4

0-4
the higher the number , the more electronegative it is

Question 5

do the noble gases have a pauling scale?

Answer 5

nope they don’t ,generally , form covalent bonds.

Question 6

what does electronegativity depend on ?

Answer 6

the nuclear charge
atom radius
shielding

Question 7

what are the trends of electronegativity in the periodic table ?

Answer 7

increases up a group as their is less shielding by inner shells .
increase across a period . nuclear charge increases , atoms become smaller and sheilding remains relatively constant

Question 8

if two atoms are the same , can a bond be polar ?

Answer 8

no the bond is completely non polar

Question 9

is two atoms are different then what is the polarity of the bond ?

Answer 9

polar .The degree of polarity depends on the difference between electronegativty .The electron density will shift to the more electronegative atom