Multiple Choice
In the periodic table, what is meant by a “family” (also called a group)?
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4. Atoms and Elements
Periodic Table: Group Names
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Which element listed is an alkali metal and therefore the most reactive metal among the choices?
A
Nickel (Ni)
B
Oxygen (O)
C
Sodium (Na)
D
Carbon (C)
Verified step by step guidance1
Identify the group of each element in the periodic table. Alkali metals are located in Group 1 of the periodic table.
Recall that alkali metals include elements such as Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
Check each element given in the problem: Nickel (Ni) is a transition metal, Oxygen (O) is a nonmetal, Carbon (C) is a nonmetal, and Sodium (Na) is an alkali metal.
Understand that alkali metals are highly reactive because they have one electron in their outermost shell, which they readily lose to form positive ions.
Conclude that Sodium (Na), being an alkali metal, is the most reactive metal among the choices provided.
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