Group 2 Elements

Which of the following properties decreases on descending Group 2 of the Periodic Table?

• Solubility of the sulfates

• Solubility of the hydroxides

• Reactivity of the elements

• Ionic character of the oxides

Which of the following occurs when magnesium is placed in cold water?

• Mg + H₂O --> MgO + H₂

• Mg + H₂O --> MgOH + 1/2H₂

• Mg + 2H₂O --> Mg(OH)₂ + H₂

• No reaction

Going down Group 2 from calcium to barium

• the first ionization energy of the element increases

• the strength of the metallic bonding increases

• the polarizing power of the 2+ ion decreases

• the stability of the nitrate to heat decreases

As Group 2 is descended

• the solubility of hydroxides and of sulfates increases

• the solubility of hydroxides increases and of sulfates decreases

• the solubility of hydroxides decreases and of sulfates increases

• the solubility of hydroxides and of sulfates decreases

What are the trends in thermal stability of carbonates and nitrates down Group 2?

• Carbonates increase, nitrates decrease

• Carbonates decrease, nitrates increase

• Carbonates increase, nitrates increase

• Carbonates decrease, nitrates decrease

What are the trends in first ionization energy and electronegativity of the elementsdown Group 2?

• Ionization energy increases, electronegativity decreases

• Ionization energy decreases, electronegativity increases

• Ionization energy increases, electronegativity increases

• Ionization energy decreases, electronegativity decreases

When calcium is added to water, effervescence occurs and

• a clear colourless solution is formed

• a cloudy suspension is formed

• an orange-red flame is seen

• a yellow flame is seen

When samples of magnesium nitrate, Mg(NO₃)₂, and calcium nitrate, Ca(NO₃)₂, are heated

• both compounds decompose to form the corresponding nitrite and oxygen

• both compounds decompose to form the corresponding oxide, nitrogen dioxide and oxygen

• magnesium nitrate decomposes to form magnesium nitrite and oxygen whereas calcium nitrate decomposes to form calcium oxide, nitrogen dioxide and oxygen

• magnesium nitrate decomposes to form magnesium oxide, nitrogen dioxide and oxygen whereas calcium nitrate decomposes to form calcium nitrite and oxygen

Which of the following could not be an element in Group 2?

• An element with an oxide which forms a solution of pH 10

• An element with an insoluble sulfate

• An element with a chloride which is liquid at room temperature

• An element with a carbonate which decomposes on heating

Which of the following trends occurs going down the elements in Group 2

• The solubility of the hydroxides increases

• The first ionization energy increases

• The solubility of the sulfates increases

• The stability of the carbonates to heat decreases