Question

Label the positive and negative atoms.

1) Si-F ionic
2) Sr-N ionic
3) P-Se polar
4) As-Br polar
5) As-O nonpolar

Answer 1

In a polar covalent bond, one atom has a slightly positive charge while the other has a slightly negative charge. In a nonpolar covalent bond, the electrons are shared equally between the atoms.

Step-by-step explanation:

In a polar covalent bond, the electrons shared by the atoms spend more time closer to one nucleus than to the other nucleus. Because of the unequal distribution of electrons between the different nuclei, a slightly positive (+) or slightly negative (6-) charge develops. For example, in P-Se bond, selenium (Se) will have a slightly negative charge (6-) and phosphorus (P) will have a slightly positive charge (6+).

In a nonpolar covalent bond, the electrons are shared equally between the atoms. There is no significant difference in the electronegativity of the atoms involved. An example of a nonpolar bond is As-O, where both atoms have similar electronegativity values.