9. Metals
A section of Chemistry, 0620
Listing 10 of 1272 questions
A student observed the reaction of various metals with both cold water and steam. Her results are shown below. metal reaction with cold water reaction with steam calcium reacts rapidly reacts very rapidly copper no reaction no reaction magnesium reacts very slowly reacts rapidly zinc no reaction reacts Put these metals in order of their reactivity. least reactive most reactive Iron is a metal between zinc and copper in the reactivity series. Predict the reactivity of iron with cold water, steam. The equation for the reaction of zinc with steam is: Zn + H2O → ZnO + H2 Write a word equation for this reaction. State three physical properties which are characteristic of most metals. 1. 2. 3. Some properties of the Group I metals are shown in the table. metal melting point / °C hardness density / g per cm3 lithium fairly hard 0.53 sodium fairly soft potassium soft rubidium very soft 1.53 caesium extremely soft 1.88 Estimate the melting point of lithium. How does the hardness of these metals change down the group? Estimate the density of potassium.
0620_s11_qp_21
THEORY
2011
Paper 2, Variant 1
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Questions Discovered
1272