Which two subatomic particles are almost always equal in number?
A) electrons and neutrons
B) protons and neutrons
C) protons and electrons
D) photons and electrons
E) neutrons and neutrinos
Correct Answer:
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Q2: The atomic number refers to the
A) mass
Q7: Which is the smallest portion of a
Q8: Isotopes
A) are identical in mass number to
Q9: Which element does not contain a neutron
Q11: All atoms of an element have the
Q11: Radioisotopes
A) are unstable and emit energy and
Q12: The neutral subatomic particle is (are) the
A)
Q13: The negative subatomic particle is (are) the
A)
Q14: Organisms consist mostly of four elements. They
Q15: A sugar or other molecule in which
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