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11 Dec 2019
Which of these pairs of elements have the same number of valence electrons?
A) oxygen (O) and bromine (Br)
B) selenium (Se) and bromine (Br)
C) carbon (C) and lead (Pb)
D) oxygen (O) and carbon (C)
E) sodium (Na) and magnesium (Mg)
Which of these pairs of elements have the same number of valence electrons?
A) oxygen (O) and bromine (Br)
B) selenium (Se) and bromine (Br)
C) carbon (C) and lead (Pb)
D) oxygen (O) and carbon (C)
E) sodium (Na) and magnesium (Mg)
Kenneth DuqueLv10
28 Sep 2020
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