Question

If a substance is made of a single element, it is(1 point)
Responses

made of one type of atom.
made of one type of atom.

made through chemical reactions.
made through chemical reactions.
Question 6
An illustration shows the periodic table.Use the periodic table to answer the question. Which element has the same number of valence electrons as bromine (Br)?(1 point)
Responses

krypton (Kr)
krypton (Kr)

chlorine (Cl)
GPT 3.5
chlorine (Cl)

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