'Atoms, Bonds and Groups' Questions. [F321]

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F321 Questions
1) Which one of the following is a fundamental particle that would not be deflected by an
electric field?
A. electron
B. neutron
C. proton
Write the correct letter, A, B or C, in the box. [1 mark]
2) A naturally occurring sample of the element boron has a relative atomic mass of 10.8g. In this
sample, boron exists as two isotopes, 10B and 11B. Calculate the percentage abundance of 10B
in this naturally occurring sample of boron. [2 marks]
3) State, in terms of fundamental particles, why the isotopes 10B and 11B have similar chemical
reactions. [1 mark]
4) Write an equation to show the process that occurs when the second ionisation energy of
boron is measured. Include state symbols in your equation. [1 mark]
5) Explain why the second ionisation energy of boron is higher than the first ionisation energy of
boron. [1 mark]
6) When heated, iron(III) nitrate (Mr = 241.8) is converted into iron(III) oxide, nitrogen dioxide
and oxygen.
4Fe(NO3)3(s) 2Fe2O3(s) + 12NO2(g) + 3O2(g)
A 2.16 g sample of iron(III) nitrate was completely converted into the products shown.
Calculate the amount, in moles, of iron(III) nitrate in the 2.16 g sample. Give your answer to 3
significant figures. [1 mark]
Calculate the amount, in moles, of oxygen gas produced in this reaction. [1 mark]
Calculate the volume, in m3, of nitrogen dioxide gas at 293 ºC and 100 kPa produced from 2.16
g of iron(III) nitrate. The gas constant is R = 8.31 J K­1 mol­1. [4 marks]
7) Nickel is a metal with a high melting point. State the block in the Periodic Table that contains
nickel. [1 mark]
8) Explain, in terms of its structure and bonding, why nickel has a high melting point. [2 marks]
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F321 Questions
9) Balance the following equation to show how anhydrous nickel(II) chloride can be obtained from
the hydrated salt using SOCl2 Identify one substance that could react with both gaseous
products. [2 marks]
......NiCl2.6H2O(s) + ...... SOCl2(g) ......NiCl2(s) + ......SO2(g) + ......HCl(g)
10) Name the strongest attractive force between two ammonia molecules. [1 mark.]
11) Draw a diagram to show how two ammonia molecules interact with each other in the liquid
phase.…read more

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F321 Questions
14) Define the term relative atomic mass. [2 marks]
15) State the strongest type of intermolecular force between one molecule of ammonia and one
molecule of water. [1 mark]
16) Phosphine (PH3) has a structure similar to ammonia. In terms of intermolecular forces,
suggest the main reason why phosphine is almost insoluble in water.…read more

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F321 Questions
17) An aluminium chloride molecule reacts with a chloride ion to form the AlCl4 - ion. Name the
type of bond formed in this reaction. Explain how this type of bond is formed in the AlCl4 -
ion. [2 marks]
Type of bond:
Explanation:
18) Aluminium chloride has a relative molecular mass of 267 in the gas phase.…read more

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