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Given three atom diagrams, each showing a single electron at different distances from the nucleus, which diagram represents the electron with the highest potential energy?
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2. Atoms & Elements
The Atom
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If an atom has 35 protons in its nucleus, which element is it?
A
Bromine (Br)
B
Krypton (Kr)
C
Chlorine (Cl)
D
Iodine (I)
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Recall that the identity of an element is determined by the number of protons in its nucleus, which is called the atomic number (Z).
Look up the atomic number on the periodic table to find which element corresponds to 35 protons.
Find the element with atomic number 35, which is the element whose symbol and name you need to identify.
Compare the atomic number 35 to the options given: Bromine (Br), Krypton (Kr), Chlorine (Cl), and Iodine (I).
Conclude that the element with 35 protons is Bromine (Br), since it has atomic number 35 on the periodic table.
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