Multiple Choice
To which element group does argon belong?
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4. Atoms and Elements
Periodic Table: Group Names
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Which element is classified as an alkali metal (Group 1) on the periodic table?
A
Sodium (Na)
B
Calcium (Ca)
C
Chlorine (Cl)
D
Helium (He)
Verified step by step guidance1
Understand that alkali metals are elements found in Group 1 of the periodic table. These elements have one electron in their outermost shell, which makes them highly reactive.
Recall the common alkali metals: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
Look at the given options and identify which element belongs to Group 1: Sodium (Na), Calcium (Ca), Chlorine (Cl), or Helium (He).
Recognize that Calcium (Ca) is an alkaline earth metal in Group 2, Chlorine (Cl) is a halogen in Group 17, and Helium (He) is a noble gas in Group 18.
Conclude that Sodium (Na) is the only element among the options that is an alkali metal in Group 1.
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