Question

1. experiment: turn on show electronegativity. electronegativity (en) describes how strongly an atom attracts a pair of shared electrons. the higher the en value, the greater the tendency of an atom to hold onto electrons in a bond and become negatively charged. electronegativity difference is found by subtracting the en value of one atom from another. choose two nonmetals with a small (or no) en difference between them. click play. what happens to the shared electrons in this bond? when the shared electrons experience the same attraction from each atom, the result is a nonpolar covalent bond. drag the bonded atoms to the nonpolar covalent bond bin. 6. experiment: choose two nonmetals with a large electronegativity difference. click play. what happens to the valence electrons in this bond? a bond in which the electrons are shared unequally is a polar covalent bond. notice the small δ+ and δ− symbols, which indicate partial charges. drag the resulting combination to the polar covalent bond bin. 7. classify: use the gizmo to categorize the remaining element combinations as forming either ionic, polar covalent, or nonpolar covalent bonds. list your results below. ionic (en difference ≥ 1.67) polar covalent (en diff. < 1.67 and > 0.40) nonpolar covalent (en difference ≤ 0.40)

Explanation:

Electronegativity difference determines bond type. When two non - metals have a small (or no) EN difference, shared electrons are attracted equally, resulting in a nonpolar covalent bond. When two non - metals have a large EN difference, valence electrons are shared unequally, forming a polar covalent bond. For element combinations, ionic bonds have an EN difference of 1.67 or greater, polar covalent bonds have an EN difference between 0.40 and 1.67, and nonpolar covalent bonds have an EN difference of 0.40 or less.

Answer:

For the first question about two non - metals with small (or no) EN difference: The shared electrons are attracted equally by each atom, forming a nonpolar covalent bond.
For the second question about two non - metals with a large EN difference: The valence electrons are shared unequally, forming a polar covalent bond.
For the classification part, one would need to know the specific element combinations to list them under ionic, polar covalent, or nonpolar covalent according to the given EN difference ranges.