Question

1. what type of bond exist between a sulfur and hydrogen atom? (1 point) *

polar covalent
nonpolar covalent
ionic

1. what type of bond exist between a potassium and fluorine atom? (1 point) *

polar covalent
nonpolar covalent
ionic

1. what type of bond exist between a silicon and oxygen atom? (1 point) *

polar covalent
nonpolar covalent
ionic

Explanation:

Question 28

To determine the bond type between sulfur (S) and hydrogen (H), we analyze electronegativity differences. Sulfur (electronegativity ~2.58) and hydrogen (electronegativity ~2.20) have a small difference (≈0.38), but more importantly, H and S are both non - metals, and the bond is covalent. Since there is a slight electronegativity difference, the bond is polar covalent. Ionic bonds form between metals and non - metals, and non - polar covalent bonds form between atoms with very similar electronegativities (like in diatomic molecules of the same element). So the bond between S and H is polar covalent.

Potassium (K) is a metal and fluorine (F) is a non - metal. Ionic bonds are formed when there is a transfer of electrons from a metal to a non - metal. Polar covalent bonds form between non - metals with an electronegativity difference, and non - polar covalent bonds form between non - metals with very similar electronegativities. Since K is a metal and F is a non - metal, the bond between them is ionic.

Silicon (Si) and oxygen (O) are both non - metals. The electronegativity of Si is around 1.90 and that of O is around 3.44. The electronegativity difference is significant (≈1.54), which means the bond is covalent and polar (because the electrons are shared unequally between the two atoms due to the electronegativity difference). Ionic bonds are for metal - non - metal combinations, and non - polar covalent bonds are for non - metals with very similar electronegativities. So the bond between Si and O is polar covalent.

Answer:

A. Polar covalent

Question 29