Which pair of elements below should be the most similar in chemical properties?
A) I and Br
B) Cs and He
C) B and As
D) C and O
E) K and Kr
Correct Answer:
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Q57: A molecular formula always indicates .
A) the
Q58: In the symbol below, x is .
Q59: Of the three types of radioactivity characterized
Q60: Which one of the following basic forces
Q61: The atomic mass unit is presently based
Q63: The mass number of an atom of
Q64: Different isotopes of a particular element contain
Q65: The element X has three naturally occurring
Q66: The species contains 16 neutrons.
A). 36Cl
B). 31P
C).
Q67: Which combination of protons, neutrons, and electrons
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