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WorksheetsAtomic Theory Unit 1 Review
Total questions: 13
Worksheet time: 3hrs 15mins
Which statement best describes electrons?
They are positive subatomic particles and are found in the nucleus.
They are positive subatomic particles and are found surrounding the nucleus.
They are negative subatomic particles and are found in the nucleus.
They are negative subatomic particles and are found surrounding the nucleus.
Which statement matches a subatomic particle with its charge?
A neutron has a negative charge.
A proton has a negative charge.
A neutron has no charge.
A proton has no charge.
An atom of carbon-12 and an atom of carbon-14 differ in
atomic mass
number of neutrons
nuclear charge
number of electrons
An atom of any element must contain
an equal number of protons and neutrons
an equal number of protons and electrons
more electrons than neutrons
more electrons than protons
During a flame test, ions of a specific metal are heated in the flame of a gas burner. A characteristic color of light is emitted by these ions in the flame when the electrons
gain energy as they return to lower energy levels
gain energy as they move to higher energy levels
emit energy as they return to lower energy levels
emit energy as they move to higher energy levels
The distance between two peaks is called
amplitude
wavelength
frequency
energy
The frequency of electromagnetic radiation is measured in waves/second, or
nanometers
quanta
hertz
joules
If the wavelength radiation A has a lower frequency than electromagnetic radiation B, then compared to B, the wavelength of A is
longer
shorter
equal
equal half the length of B's wavelength
When frequency increases, the wave energy
(a)
An AM radio station uses radio waves with wavelengths of 300 meters. How much energy is in this wave?
Which scientists believed the atom is a ball of positive charges with a few small negative charges scattered throughout. (Plum Pudding Model)
JJ Thomson
John Dalton
Ernest Rutherford
Niels Bohr
Which scientists believed the atom contained all 3 subatomic particles?
Democritus
John Dalton
James Chadwick
JJ Thomson
Which scientist believed Atoms are indivisible and they cannot be broken into smaller parts.
Democritus
John Dalton
Niels Bohr
James Chadwick
