Question

1. which of the following elements behaves the most like the team pulling the hardest in the figure c tug - of - war game?

a. li
b. be
c. b
d. n
e. o
f. f

1. in a polar covalent bond, electrons are:

a. shared equally between atoms
b. transferred completely from one atom to another
c. shared unequally between atoms, causing partial charges
d. not shared or transferred at all

1. what is the correct name for the compound with the formula ( n_2o_5 )?

a. nitrogen oxide
b. dinitrogen pentoxide
c. nitric oxide
d. pentanitrogen dioxide

1. which type of bond involves a \sea of electrons\ that move freely between metal atoms?

a. ionic bond
b. covalent bond
c. metallic bond
d. hydrogen bond

Explanation:

• Question 26: Fluorine (\(F\)) has the highest electronegativity among the given elements. In a tug - of - war analogy for electrons (similar to how electronegativity represents an atom's pull on electrons in a bond), the element with the highest electronegativity pulls the hardest.
• Question 27: In a polar covalent bond, due to the difference in electronegativity between the two atoms, electrons are shared unequally. This unequal sharing causes partial charges (\(\delta+\) and \(\delta-\)) on the atoms.
• Question 28: For binary covalent compounds, we use prefixes. The prefix “di -” is for \(2\) and “penta -” is for \(5\). So, \(N_{2}O_{5}\) is dinitrogen pentoxide.
• Question 29: Metallic bonds are characterized by a “sea of electrons” that move freely between metal atoms. Ionic bonds involve the transfer of electrons, covalent bonds involve the sharing of electrons (usually between non - metals), and hydrogen bonds are a type of intermolecular force.

Answer:

• 26. F. F
• 27. C. Shared unequally between atoms, causing partial charges
• 28. B. Dinitrogen pentoxide
• 29. C. Metallic bond