A nucleus X decays by emitting a β+ particle to form a new nucleus, .
State the number of protons and the number of neutrons in nucleus X.
number of protons = ...............................................................
number of neutrons = ...............................................................
State one similarity between a β+ particle and a β– particle.
State the quark composition of a meson.
A hadron consists of two down quarks and a charm quark.
Determine the charge of the hadron. Show your working.
charge = ..................................... C
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