Question

mastery quiz: ionic bonding

1. *which is the appropriate reason for cacl₂?

(a) calcium (ca) is double
(b) calcium nitrate ion
(c) calcium (it) chloride
(d) calcium charge

1. *which of the following explains the octet (ionic compounds) form in nature?

(a) oppositely charged ions are electrostatically attracted to one another, which involves a metal and a nonmetal
(b) oppositely charged ions are attracted to one another; each cation forms one ionic bond with one anion
(c) many ionic compounds form a lattice structure, which results from loss of electrons, maximizing the attraction between cations and anions
(d) transition metals and nonmetals that can form a lattice structure with nonmetals. non-
transition metals form diatomic molecules.

1. which of the following atoms would have a stable (octet-level) configuration as a neutral atom?

(a) fluorine
(b) neon
(c) germanium
(d) lead

1. *which of the following is the correct formula for lead (ii) oxide?

(a) pbo
(b) pbo₂
(c) pb₂o
(d) pb₂o₃

1. *which properties are most common in metals?

(a) low ionization energy and low electronegativity
(b) low ionization energy and high electronegativity
(c) high ionization energy and low electronegativity
(d) high ionization energy and high electronegativity

1. *which of the following shows the correct lewis dot diagram for an ion of nitrogen?

(a)
(b)
(c)
(d)
(e)

1. a bond between atoms of which two elements will result in a net transfer of 3 electrons?

(a) potassium and bromine
(c) calcium and oxygen
(b) sodium and arsenic
(d) magnesium and sulfur
(e) aluminum and nitrogen
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Explanation:

Step1: Identify the Discipline and Subfield

The questions are about chemical concepts like ionic compounds, Lewis dot structures, and metal properties, so the subfield is Chemistry (under Natural Science).

Step2: Solve Question 1 (Assuming "CACL" is a typo, maybe "CaCl₂")

For naming ionic compounds, we use the cation (metal) name and anion (non - metal) name with -ide. Calcium (Ca) is the cation, Chloride (Cl⁻) is the anion. So the name is Calcium Chloride.

Step3: Solve Question 2

Ionic compounds form a lattice structure. Option (C) says "Many ionic compounds form a lattice structure, which results from ions of opposite charge attracting to one another" which is correct. Option (A) is wrong as oppositely charged ions attract. Option (B) is wrong as ionic compounds don't involve sharing. Option (D) is wrong as transition metals can form ionic compounds.

Step4: Solve Question 3

A stable low - level electron configuration for a non - metal is like a noble gas (8 valence electrons, or 2 for He). Fluorine (F) gains 1 electron to have 8, Neon (Ne) is a noble gas (stable), Germanium (Ge) is a metalloid, Lead (Pb) is a metal. But the question is about a non - metal? Wait, maybe the question is which atom has a stable electron configuration. Neon (Ne) is a noble gas with a stable electron configuration (8 valence electrons). So the answer is (B) neon.

Step5: Solve Question 4 (Lead (II) oxide)

Lead (II) means the charge of Pb is +2, oxide is O²⁻. The formula is determined by criss - cross method: Pb²⁺ and O²⁻, so the formula is PbO. So the answer is (A) PbO.

Step6: Solve Question 5

Metals have low ionization energy (easy to lose electrons) and low electronegativity (don't attract electrons strongly). So option (A) Low ionization energy and low electronegativity is correct.

Step7: Solve Question 6 (Lewis dot for nitride ion, N³⁻)

Nitrogen has 5 valence electrons. The nitride ion (N³⁻) has 5 + 3 = 8 valence electrons. The Lewis dot structure should have 8 electrons (3 lone pairs and 1 bond pair? No, for the ion, it's [:N:]³⁻. So option (C) [:N:]⁻³ is correct.

Step8: Solve Question 7

We need a bond with a net transfer of 3 electrons. Let's check the charges:

• Potassium (K) is +1, Bromine (Br) is -1: transfer 1 electron.
• Sodium (Na) is +1, Arsenic (As) can be -3 (in some compounds). So Na and As: Na⁺ and As³⁻. To form a compound, we need 3 Na⁺ and 1 As³⁻, so net transfer of 3 electrons (3 Na lose 1 each, As gains 3).
• Calcium (Ca) is +2, Oxygen (O) is -2: transfer 2 electrons.
• Magnesium (Mg) is +2, Sulfur (S) is -2: transfer 2 electrons.
• Gallium (Ga) - not sure, but among the options, (B) sodium and arsenic is correct.

Answer:

1. Calcium Chloride (assuming "CACL" is CaCl₂)
2. (C) Many ionic compounds form a lattice structure, which results from ions of opposite charge attracting to one another
3. (B) neon
4. (A) PbO
5. (A) Low ionization energy and low electronegativity
6. (C) [:N:]⁻³
7. (B) sodium and arsenic