Which of the following options lists the fundamental forces in decreasing order of relative strength?

strong, electromagnetic, weak, gravitational

The absorption spectrum of an element provides evidence of what?

discrete energy levels of the electrons in an atom

What is meant by “half-life”?

the time it takes for the activity of a radioactive sample to halve

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IB DP Physics: Atomic, nuclear and particle physics

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Aligned to the IB Diploma Programme. Suitable for ages 16-19. Test your knowledge on Atomic, nuclear and particle physics. #IB #Physics #science

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Questions 8

Answers

1
Geiger and Marsden's experiments led to Rutherford’s model of the atom. What did these experiments provide evidence of?
a positive charge, uniformly distributed in the atom
a small, dense nucleus
the existence of neutral particles, together with positive and negative
the existence of electrons in orbitals
2
Which of the following options lists the fundamental forces in decreasing order of relative strength?
strong, electromagnetic, gravitational, weak
strong, electromagnetic, weak, gravitational
electromagnetic, strong, gravitational, weak
electromagnetic, strong, weak, gravitational
3
How does the average binding energy per nucleon of thorium, E_Th, compare to that of uranium, E_U?
ETh > EU
ETh = EU
ETh < EU
EU = ETh + Ealpha
4
The absorption spectrum of an element provides evidence of what?
the wave nature of light
Rutherford’s model of the atom
discrete energy levels in the nucleus an atom
discrete energy levels of the electrons in an atom
5
True or False? In the following reaction, particle X is a neutrino.
True
False
6
What is meant by “half-life”?
the time it takes for the activity of a radioactive sample to halve
the time it takes for a particular radioactive nucleus to break in half
the time it takes for a radioactive nucleus to half its ionisation power
the time it takes for half of the nuclei to stop being radioactive
7
The following Feynman diagram represents a possible decay of a neutron. What conservation law is violated in this:
conservation of lepton number
conservation of charge
conservation of strangeness
conservation of baryon number
8
True or False? The charge of the antiparticle to the photon is –1.
True
False

IB DP Physics: Atomic, nuclear and particle physics Flashcards | StudBud