Name the elements present in each period in sequence
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Answer:
All but the noble gas argon are essential to basic geology and biology.
Sodium (Na) is an alkali metal. ...
Magnesium (Mg) is an alkaline earth metal. ...
Aluminium (Al) is a post-transition metal. ...
Silicon (Si) is a metalloid. ...
Phosphorus (P) is a nonmetal essential to DNA. ...
Sulfur (S) is a nonmetal. ...
Chlorine (Cl) is a halogen.
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Explanation:
Hydrogen and helium
ok so this is the answer
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