The symbols Z, A, and N respectively stand for
A)
neutron number, atomic mass number, atomic number.
B)
atomic number, atomic mass number, neutron number.
C)
atomic number, neutron number, atomic mass number.
D)
atomic mass number, atomic number, neutron number.
E)
atomic mass number, proton number, nucleon number.
B
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The safest and simplest way to observe the partial phases of a solar eclipse is to use _______________ projection
Fill in the blank(s) with correct word
What do astronomers infer from the motion of the distant galaxies?
A. The Universe is static. B. The Universe is spinning. C. The Universe is contracting. D. The Universe is expanding. E. None of these choices is correct.
The total mass of the Kuiper belt is greater than that of the asteroid belt
Indicate whether the statement is true or false
The pattern of hot convective cells rising in the photosphere is called
A) aurora. B) prominences. C) granulation. D) flares. E) sunspots.