Atomic Structure
                     Atomic Structure & Bonding 
Assignment : Lab-Based 
Element Analysis and 
Molecular Case Study
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University University of Nottingham (UON)
Subject Atomic Structure and Bonding
Scenario One
You are working in a laboratory, and a series of samples is received 
which you are asked to identify. The samples are provided by an 
organisation which does not have specialised chemistry knowledge, so 
your essay should include significant information to enable them to 
understand how you have identified the samples, as well as an 
explanation of the basic structure of an atom. Through 
experimentation you discover that the samples have the following 
atomic numbers:
1. 9
2. 36
3. 47
4. 56
You must explain the concepts of ‘mass number’ and ‘relative atomic 
mass’, and explain what the difference is between them.
Finally, you have been asked to calculate the ‘nucleon number’ for each
of these samples and explain what this means.
Scenario Two
Consider the same four elements that you identified in scenario one. 
For each of these, you need to write their electron configurations in 
terms of s, p, d and f shells, and then explain your reasoning.
Review the periodic table below.
There are 5 elements identified with a black circle. Deduce the electron 
structure of all five based upon their positions in the periodic table and 
explain your reasoning.
Scenario Three
Read the following extract:
“Atmospheric ions are electrically charged particles which occur 
naturally in the atmosphere. They form in the upper atmospheric 
layers mainly because of the action of ultraviolet radiation from the 
sun, as well as in lower atmospheric layers as a result of radioactive 
radiation and cosmic rays. These cause ionisation of neutral molecules 
or atoms. As a result, ions are formed. These ions almost 
instantaneously combine to form molecules with ionic bonds.”
The extract mentions ‘ions’. Explain what these are in terms of their 
electronic
structure, and how this is different from an atom.
The extract mentions ‘ionic bonds’. Explain what these are, and how 
they form in terms of electron structure.
Scenario Four
Read the following extract:
“A polymer is a substance which has a molecular structure comprising 
of a large number of identical molecules covalently bonded together to 
form a long chain structure. Many synthetic organic materials are 
polymers, such as nylon, polythene and Kevlar.”
The extract mentions ‘covalent bonds’. Explain what these are, and the 
formation of different types that can exist i.e. single, multiple etc.
Do some research and identify 4 simply covalently bonded molecules. 
Draw dot and cross diagrams of each to show the bond formation of 
each of your 4 examples.
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