Module 1 Electronegativity Flashcards
When is the sharing of electrons equal in a covalent bond?
When both atoms are the same
What is the definition of electronegativity?
The ability of an atom in a covalent bond to attract the bonded pair of electrons.
What patterns are present in the periodic table in relation to the Pauling scale?
As you go left and down (From fluorine which has the highest electronegativity) the electronegativity of atoms decreases.
Which noble gas has the highest electronegativity?
None. They all have an electronegativity of 0 as they have a full outer shell and rarely bond
Where do you draw the electrons on a diagram for strong, weak and equal electronegative compounds?
Weak/strong: closer to the stronger atom
Equal: the electrons are in the middle of each.
What charge will the weaker and stronger electronegative atoms in a covalent compound have?
Weak: slightly positive
Strong: slightly negative
What is a polar bond?
A polar bond is a covalent bond in which there is a separation of charge between each end (Slightly Positive and Slightly Negative)
Give an example of a polar molecule
HCl is polar. H—:-Cl
H is slightly positive
Cl is slightly negative
What is a permanent dipole?
A molecule with opposite charges at each end of the molecule.
When is a covalent bond pure?
When the electrons are held exactly in the middle of each atom.
when is an ionic bond pure?
when the weaker atom completely loses control over the electrons and they go right to the stronger atom.
What is the charge density formula?
Charge density =
charge of the ion divided by Ionic radius
