Zadanie 2c
(i) Write the equation for the reaction of Rb with water, H2O, including state symbols. (ii) Describe the type of bonding in Rb and in H2O, and explain how the valence electrons in each produce that type of bond.
The metallic model
Umiejętności w tym dziale
Umiejętności z tego działu sprawdzają 22 zadania wzorowane na arkuszach IB z lat 2022–2026. Dział pojawia się w 21 z 54 arkuszy w bazie.
Zadania z tego działu: 22 Otwórz w wyszukiwarce z filtrami
Zadanie 3a
(i) Describe the structure of solid magnesium and state the forces that hold it together. (ii) Explain why a piece of magnesium can be hammered into a new shape without breaking. (iii) Explain why the melting point of magnesium is higher than that of sodium.…
Zadanie 3b
(i) Outline why the strength of the metallic bond increases from potassium, K, to calcium, Ca. (ii) Write an equation for the reaction of potassium, K, with water, including state symbols. (iii) Outline why the electronegativity of chlorine is greater than…
Zadanie 1c
Contrast tin and tin(IV) iodide in terms of one physical property.
Zadanie 11
Which list arranges the metals in order of increasing strength of metallic bonding (weakest first)? A. Rb, Mg, Na, Al B. Al, Mg, Na, Rb C. Rb, Na, Mg, Al D. Na, Rb, Al, Mg
Zadanie 2e
State one other physical property that could be measured to identify the metal while leaving the block intact.
Zadanie 11
Which statement best explains why aluminium can be drawn into thin wires? A. The delocalized electrons carry charge through the metal. B. The layers of aluminium ions can slide over each other while the delocalized electrons keep the lattice bonded. C.…
Zadanie 7
In which set do all the species contain delocalized electrons? A. NH4+, C6H12, Si(s) B. CH3OH, SO2, C (diamond) C. C2H4, NO3−, SiO2 D. CO32−, C6H6, Cu(s)
Zadanie 11
Copper can be hammered into thin sheets without shattering. Which feature of metallic bonding explains this? A. The delocalized electrons are free to move through the lattice, carrying charge. B. The metallic bonds are weak, so the cations are easily displaced…
Zadanie 7b
Potassium iodide, KI, and potassium metal, K, are both solids at room temperature. State the type of bonding in each of the two solids and describe it.