An isotope of which of the following elements is chosen as a standard in measuring atomic mass?
A) Carbon
B) Oxygen
C) Hydrogen
D) Neon
E) Helium
Correct Answer:
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Q25: Which one of the following statements about
Q26: Which of the following symbols does not
Q27: In the modern periodic table, the order
Q28: Bromine is the only nonmetal that is
Q29: Which of the following is a metal?
A)Nitrogen,
Q31: Which of the following is a metalloid?
A)Carbon,
Q32: Silicon, which makes up about 25% of
Q33: One amu is defined as
A)the mass of
Q34: Atoms X, Y, Z, and R have
Q35: The chemical symbol for potassium is
A)P.
B)Po.
C)Pt.
D)Pm.
E)K.
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