M2S5 – Ionic Structure and Bonding

Which of these sets of properties is that of an ionic compound?

An element M has two electrons in its outer shell. An element X has seven electrons in its outer shell. What is the likely formula of the compound of X and Y?

What is the electron configuration of an oxide ion?

Typically ionic compounds:

(i) are soluble in water

(ii) conduct electricity when dissolved in water

(iii) are insoluble in liquid hydrocarbons

(iv) decompose when they dissolve in water

During the electrolysis of molten sodium chloride:

(i) sodium metal forms at the negative electrode

(ii) sodium ions are reduced at the cathode

(iii) chloride ions lose electrons at the positive electrode

(iv) chlorine atoms are given off as a gas at the anode

A chloride ion and an argon atom have the same:

(i) number of protons

(ii) number of electrons

(iii) atomic number

(iv) electron configuration

Which of these materials consist of a giant structure of ions?

(i) magnesium oxide

(ii) silicon dioxide

(iii) potassium fluoride

(iv) silicon chloride

How many chloride ions touch each sodium ion in the crystal structure of sodium chloride?

At room temperature, in the crystal lattice of an ionic compound the ions are:

(i) arranged symmetrically

(ii) uncharged

(iii) held together by electrostatic forces

(iv) stationary

Which of these true statements can help to explain why magnesium chloride has a higher melting point than sodium chloride:

(i) magnesium ions are smaller than sodium ion

(ii) magnesium is a less reactive metal than sodium

(iii) the charge on a magnesium ion is double the charge on a sodium ion

(iv) the first ionisation energy is higher for magnesium than for sodium