Which statement concerning the elements fluorine, chlorine, bromine, and iodine is incorrect?
A) These elements are all halogens.
B) These elements all have the same valence shell.
C) These elements are all nonmetals.
D) These elements all have the same number of valence electrons.
Correct Answer:
Verified
Q22: Which isotope is not possible?
A) 
Q24: How many protons are in the isotope
Q25: How many neutrons are in the isotope
Q26: In the diagram below, which highlighted element
Q28: How many electrons are in the isotope
Q29: Which element is most likely to be
Q29: What is the symbol for the isotope
Q30: The proper electron-dot symbol for aluminum is
A)
Q30: Which element has the smallest ionization energy?
A)K
B)Ga
C)Br
D)Rb
Q36: Which element is a d block element?
A)S
B)Ar
C)Ag
D)As
E)None
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