Which statement about elements and their relationship in the periodic table is true?
7.
a.
Which statement about elements and their relationship in the periodic table is true?
Chlorine and iodine are alkali metals.
b.
Potassium and phosphorus are in the same group.
Calcium and magnesium are alkaline-earth metals.
d. Boron and silicon are in the same period.
e. Lead and tin are both non-metals.
c.
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7.
a.
Which statement about elements and their relationship in the periodic table is true?
Which statement about elements and their relationship in the periodic table is true?
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