What are beta particles? hydrogen nuclei electromagneticradiation electrons heli
ID: 683713 • Letter: W
Question
What are beta particles?hydrogen nuclei
electromagneticradiation
electrons
heliumnuclei
An alpha particle has
one proton and threeneutrons.
two protons and twoneutrons.
three protons and threeneutrons.
four protons.
Half-lives of radioactive isotopes are
very short.
very long.
range from seconds todays
vary from shorter than amillisecond to millions of years.
The difference in brightness between two stars is relatedto
the amount of light andenergy produced by the stars.
the relative size of thestars.
the distances between thestars.
all ofthese.
The expected life span of a star the size of the Sunis
10 billionyears
1 billionyears
100 millionyears
10 millionyears
Explanation / Answer
What are beta particles? Electrons (the definition of beta particles is that theyhave a negative charge of one) An alpha particle has Two protons, two neutrons (see definition of alphaparticle) Half-lives of radioactive isotopes are Vary from shorter than a millisecond to millions of years(it depends on the radioisotope) The difference in brightness between two stars is relatedto All of these. The expected life span of a star the size of the Sunis 10 billion years (somewhat common knowledge).