Which of the following is sometimes used in diagnostic imaging?
A) a radioisotope
B) a proton
C) an ion
D) an atom
E) an electrolyte
Correct Answer:
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Q15: An element has 6 electrons, 6 protons,
Q16: Covalent bonds are formed when
A) atoms share
Q17: Which of the following would have a
Q18: A molecule containing two atoms of hydrogen
Q19: Which is the correct description of a
Q21: In a molecule of hydrogen, a pair
Q22: If two pairs of electrons are shared
Q23: Which of the following is an example
Q24: The symbol ⇌, used in visual chemical
Q25: The reaction NaOH + HCl → NaCl
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