Use the information in the table below to answer the questions that follow. The letters do not represent that actual symbols of the elements.
a) Give the reasons why the meling point of:
i) S is higher than that of R
ii) V is lower than that of U
b) How does the reactivity of W with chlorine compare with that of R with chlorine?
c) Write an equation for the reaction between T and excess oxygen
d) When 1.15g of R were reacted with water, 600cm3 of gass was produced.
Determine the relative atomic mass of R. (Molar gas volume = 24000cm3)
e) Give one use of element V
(a)(i) Metallic bonds in S are stronger than in R.
(ii) V is monoatomic (independent) hence weaker van der waals forces while U is diatomic hence stronger van der waals forces
V has less van der waals forces while U has more van der waal forces
(b) reacts more vigorously/more reactive/reacts faster
- reactivity of group 1 elements increases down the group/Ionisation energy is less than that of R
- easier to lose outer electron in W than in R
W is more electropositive than R
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