Referring to the periodic table, name (a) the halogen in
Chapter 4, Problem 97QP(choose chapter or problem)
Problem 97QP
Referring to the periodic table, name (a) the halogen in the fourth period, (b) an element similar to phosphorus in chemical properties, (c) the metal in the fifth period with the lowest ionization energy, (d) an element that has an atomic number smaller than 20 and is similar to strontium.
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