Tutorial 1b
Principle of Physical Chemistry (CHM3062)
1. Write the nuclear symbols for three isotopes of oxygen in which there are 8, 9, and 10 neutrons,
respectively.
2. Write the nuclear symbol for an atom with 32 protons and 38 neutrons
3. Identify the number of protons and electrons in the Sc3+ ion.
4. Give the symbol of an ion which has 10 e- and 7 p+.
5. Who first proposed the Atomic Theory?
6.
State four parts to Dalton’s Atomic theory.
7. Why was Dalton’s Atomic Theory not entirely correct?
8. What did J.J. Thomson first discover?
9. How did J. J. Thomson make his first discovery?
10. Who discovered the neutron?
11. The atomic model where electrons occupied shells of fixed energy was proposed by?
12. What term is used to describe the number of protons in an atom?
13. A single ion of an unnamed element is found to have 157 neutrons, 106 protons, and 103 electrons.
What is the atomic number of this element?
14. The number of protons and electrons in N3- is
15. The number of protons and electrons in Ca2+ is
16. The number of protons in Al3+ is
17. The compound GaAs is used in electronic displays in some calculators. How many electrons are in
the ion Ga3+?
18. The number of protons(p), neutrons(n), and electrons(e) represented by the symbol 37Cl1- is
19. How many neutrons are present in a 1- ion of the isotope chlorine -37?
20. How many electrons surround the nucleus of a 2+ ion of calcium - 44?