Ionic Bonding Quiz 2

1. What are the symbols for the ions in magnesium chloride, MgCl₂?

Mg+ and Cl−

Mg- and Cl+

Mg2+ and Cl−

Mg+ and Cl2−

The correct answer is Mg2+ and Cl− because magnesium (Mg) has a charge of +2, meaning it loses two electrons to become positively charged, while chlorine (Cl) has a charge of -1, meaning it gains one electron to become negatively charged. Therefore, when they combine to form magnesium chloride (MgCl2), magnesium has a charge of +2 and chlorine has a charge of -1.

Explanation

The correct answer is Mg2+ and Cl− because magnesium (Mg) has a charge of +2, meaning it loses two electrons to become positively charged, while chlorine (Cl) has a charge of -1, meaning it gains one electron to become negatively charged. Therefore, when they combine to form magnesium chloride (MgCl2), magnesium has a charge of +2 and chlorine has a charge of -1.

2. Which of the following 'dot-and-cross' diagrams shows the bonding in calcium fluoride?

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Explanation

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3. What is the simplest formula of the compound containing the ions X⁴⁺ and Y^2-?

XY2

X2Y

X2Y4

X4Y2

The simplest formula of the compound containing the ions X4+ and Y2- is XY2. This is because the charges on the ions must balance out to form a neutral compound. The 4+ charge on X cancels out with the 2- charge on Y, resulting in a balanced compound with a formula of XY2.

Explanation

The simplest formula of the compound containing the ions X4+ and Y2- is XY2. This is because the charges on the ions must balance out to form a neutral compound. The 4+ charge on X cancels out with the 2- charge on Y, resulting in a balanced compound with a formula of XY2.