CHEM0010 - STRUCTURE EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
Mass, charge and spin of electron.
Mass = 0
Charge = -1
Spin = 1/2
Mass, charge and spin of proton.
Mass = 1
Charge = +1
Spin = 1/2
Mass, charge and spin of neutron.
Mass = 1
Charge = 0
,Spin = 1/2
What is an isotope?
Elements with the same number of protons but different number of neutrons.
5 steps of mass spectrometer.
1. Sample vapourised.
2. Electron beam ionises sample.
3. Ion is accelerated by electric field.
4. Magnetic field deflects particles depending on mass/charge ratio.
5. Ions detected. Smaller charge deflects more and larger charge deflects less.
How to calculate relative atomic mass of an element.
( Mass x relative abundance ) / 100
What is the Pauli principle?
Only 2 electrons can occupy each orbital.
What is the Aufbau principle?
Lowest energy orbitals are occupied first.
What is Hund's rule?
, Orbitals of equal energy are each occupied by one electron before any orbital is
occupied by a second electron, and all electrons in singly occupied orbitals must have
the same spin.
What are s, d, p and f blocks?
s = Groups 1+2
d = Transition metals
p = Groups 3-8
f = Elements under periodic table
What is a wavefunction? Give an example of one.
A mathematical description of the distribution of electrons in terms
of position and time.
Electrons are an example.
What is wave-particle duality?
A quantum mechanics theory that entities exhibit both wave-like and particle-like
behaviour.
What is the Heisenberg Uncertainty Principle?
It is impossible to simultaneously determine the momentum and the position of an
electron.
What is an orbital?
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
Mass, charge and spin of electron.
Mass = 0
Charge = -1
Spin = 1/2
Mass, charge and spin of proton.
Mass = 1
Charge = +1
Spin = 1/2
Mass, charge and spin of neutron.
Mass = 1
Charge = 0
,Spin = 1/2
What is an isotope?
Elements with the same number of protons but different number of neutrons.
5 steps of mass spectrometer.
1. Sample vapourised.
2. Electron beam ionises sample.
3. Ion is accelerated by electric field.
4. Magnetic field deflects particles depending on mass/charge ratio.
5. Ions detected. Smaller charge deflects more and larger charge deflects less.
How to calculate relative atomic mass of an element.
( Mass x relative abundance ) / 100
What is the Pauli principle?
Only 2 electrons can occupy each orbital.
What is the Aufbau principle?
Lowest energy orbitals are occupied first.
What is Hund's rule?
, Orbitals of equal energy are each occupied by one electron before any orbital is
occupied by a second electron, and all electrons in singly occupied orbitals must have
the same spin.
What are s, d, p and f blocks?
s = Groups 1+2
d = Transition metals
p = Groups 3-8
f = Elements under periodic table
What is a wavefunction? Give an example of one.
A mathematical description of the distribution of electrons in terms
of position and time.
Electrons are an example.
What is wave-particle duality?
A quantum mechanics theory that entities exhibit both wave-like and particle-like
behaviour.
What is the Heisenberg Uncertainty Principle?
It is impossible to simultaneously determine the momentum and the position of an
electron.
What is an orbital?
