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Multiple Choice
Which group of elements has properties most similar to potassium?
A
Lithium, sodium, rubidium, and cesium
B
Beryllium, magnesium, calcium, and strontium
C
Carbon, silicon, germanium, and tin
D
Fluorine, chlorine, bromine, and iodine
Verified step by step guidance
1
Identify the position of potassium (K) on the periodic table. Potassium is an alkali metal located in Group 1.
Recall that elements in the same group (vertical column) of the periodic table have similar chemical properties because they have the same number of valence electrons.
List the elements in Group 1, which includes lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). These elements share similar reactivity and properties.
Compare the other groups given: Group 2 (alkaline earth metals), Group 14 (carbon group), and Group 17 (halogens) have different properties and valence electron configurations than potassium.
Conclude that the group containing lithium, sodium, rubidium, and cesium has properties most similar to potassium because they are all alkali metals in Group 1.