periodicity - group 2 review part 1

periodicity - group 2 review part 1

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periodicity

a review

Multiple Choice

The higher the ionization energy...

• the more attracted the valence electron is to the nucleus so it is harder to remove

• the less attracted the valence electron is to the nucleus so it is easier to remove

• the more attracted the valence electron is to another electron, so it is harder to remove

• the more repelled a valence electron is to another electron, so it is easier to remove

Multiple Choice

Sodium, aluminium and silicon are three elements in Period 3. Each element forms an oxide.

Which row has three correct properties of these oxides?

• sodium oxide : basic

  aluminium oxide : basic

  silicon dioxide : amphoteric

• sodium oxide : giant ionic

  aluminium oxide : giant ionic

  silicon dioxide : simple molecular

• sodium oxide : high melting point

  aluminium oxide : low melting point

  silicon dioxide : high melting point

• sodium oxide : reacts with water

  aluminium oxide : no reaction with water

  silicon dioxide : no reaction with water

Multiple Select

A little water is added to each of the following compounds and the mixture warmed.

For which compounds will an acidic gas be evolved?

• sodium chloride

• aluminium chloride

• phosphorus pentachloride

Multiple Choice

Element Z has a giant structure.

The chloride of Z reacts with water to give a solution with a pH less than 5.

Which pair shows two elements which could be Z?

• aluminium, magnesium

• aluminium, silicon

• phosphorus, magnesium

• phosphorus, silicon

Multiple Select

when added to water, which oxides will not cause a change in pH?

• Al₂O₃

• SiO₂

• P₄O₁₀

Open Ended

suggest the equation for the reaction between Ga₂O₃(s) and HCl(aq)

Open Ended

suggest the equation for the reaction between Ga₂O₃(s) and NaOH(aq)

group 2

a review

Open Ended

a sample of barium is heated in oxygen.

a. describe two observations for this reaction.

b. write an equation for this reaction. include state symbol

Multiple Choice

which property shows an increase from calcium to barium going down the group 2?

• the ease of decomposition of the carbonates

• the solubility of the hydroxides

• the solubility of the sulfates

• the volume of hydrogen given off when 1 g of the metal reacts with water

Multiple Choice

An excess of MgO is shaken with water. The resulting mixture is filtered into test-tube P.

An excess of BaO is shaken with water. The resulting mixture is filtered into test-tube Q.

Which oxide reacts more readily with water and which filtrate has the lower pH?

• oxide reacts more readily with water : BaO

  test tube with filtrate of lower pH : P

• oxide reacts more readily with water : BaO

  test tube with filtrate of lower pH : Q

• oxide reacts more readily with water : MgO

  test tube with filtrate of lower pH : P

• oxide reacts more readily with water : MgO

  test tube with filtrate of lower pH : Q

Multiple Choice

Which reaction shows the strong heating of magnesium nitrate?

• Mg(NO₃)₂ --> Mg(NO₂)₂ + O₂

• Mg(NO₃)₂ -->MgO₂ + 2NO₂

• Mg(NO₃)₂ --> MgO + N₂O + 2O₂

• 2Mg(NO₃)₂ --> 2MgO + 4NO₂ + O₂

Multiple Select

strontium nitrate is heated strongly for several minutes.

which statements are correct?

• a brown gas is produced

• a gas is produced that relights a glowing splint

• a white powder remains after heating