Chemistry- Structures and Properties Exam
Questions With Correct Answers.
What is Rutherfords model? - answeratoms have small positive nucleus at centre, mostly
empty space, electrons orbit nucleus.
Problem with Rutherfords model - answerinability to explain stability of electrons or spectral
...
Chemistry- Structures and Properties Exam
Questions With Correct Answers.
What is Rutherfords model? - answer✔atoms have small positive nucleus at centre, mostly
empty space, electrons orbit nucleus.
Problem with Rutherfords model - answer✔inability to explain stability of electrons or spectral
lines in atomic spectra
What is atomic spectra? - answer✔Atoms when excited emit characteristic
frequencies of light.
Continuous spectra? - answer✔continuous range of colours without distinct lines, when solid,
liquid gas emits light
Emission spectra? - answer✔atoms emit light after being excited to higher energy levels, lines
correspond to to energy differences
Absorption spectra? - answer✔When light passes through a substance, certain wavelengths are
absorbed, while others are transmitted or reflected. The absorption spectrum shows which
wavelengths are absorbed and to what extent
Plank's Quantum Hypothesis - answer✔energy comes in tiny packets (quanta) which have a
fixed size
Einstein - answer✔light comes in packets called photons that when they hit metal, give off
energy
Bohr's model of the atom? - answer✔Placed electrons in planet-like orbits around the nucleus
of the atom. Jump between orbitals by absorbing/emitting energy In photons
Problem with Bohr's model? - answer✔couldn't explain atoms with more than 1 electron,
couldn't account for fine details in atomic spectra
Line spectra? - answer✔tells us the difference between orbitals/energy levels
DeBroglie theory - answer✔Electrons have wave like behaviour (explains why electrons have
regions of space he don't exist in)
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