Atoms and Molecules
Week 1
Lectures
- Atomic structure, protons, electrons and neutrons;
relative atomic mass; amu; Avogadro's number. (MC)
- The Periodic Table, metals and non-metals, groups and
periods; atomic orbitals, shielding and electronegativity. (MC)
- Isotopes, stable & unstable; mass spectra; radioactivity,
half-life. (AC)
Background reading
General, Organic & Biological Chemistry Structures of Life
Chapters 1, 2 and 3
Chemistry,
Molecules, Matter, and Change:
Chapters 1, 2 and
22
Study guide
General, Organic & Biological Chemistry Structures of Life
2.1,
2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 3.1, 3.2, 3.5.
Chemistry, Molecules, Matter, and Change:
pp 1 - 17 (atoms
and the Periodic Table), 976 - 981 (radioactive decay)
Related learning aids
The Periodic
Table
Atoms information page
Radioactivity information page
External
quiz pages
Overheads from the lectures
Problems
1. An element has atomic number 17 and atomic weight 35.45 (to 2 decimal places).
What element is it? How many protons and electrons does each atom have? What, if
at all, can be deduced about its isotopic composition and the number of neutrons
in each atom? How many atoms are there in each gram? What is the average weight
of one atom. What is the ground state electronic configuration?
Answer
2. Using the periodic table, which common element is likely to have chemical
properties most similar to those of selenium (Se)? Is it likely to be more
electronegative than selenium?
Answer
3. Given the melting points of the following elements, estimate the melting point
of Potassium. (K).
|
Li
|
181°C
|
|
Na
|
98°C
|
Rb
|
39°C
|
Cs
|
29°C
|
(Use the
Periodic Table to help answer this question)
Answer
4. The half-life of a parent isotope in a rock is 5x106 years. The ratio of the
parent : daughter isotopes in the rock was found to be 1 : 7 in atomic
proportions. What is the age of the rock?
Answer
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This page was last updated by Martin Chaplin
on
2 September, 2008
|
