Multiple Choice
Which element belongs to group 17 and period 2 of the periodic table?
2. Atoms & Elements
Periodic Table: Group Names
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Which element has chemical properties most similar to potassium?
A
Al
B
Na
C
Ca
D
Mg
Verified step by step guidance1
Understand 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.
Identify the group of potassium (K) in the periodic table. Potassium is in Group 1, which is the alkali metals group.
Look at the options given: Al (aluminum), Na (sodium), Ca (calcium), and Mg (magnesium). Determine which of these elements is in the same group as potassium.
Recognize that sodium (Na) is also in Group 1, just above potassium, meaning it has similar chemical properties due to having one valence electron.
Conclude that sodium (Na) has chemical properties most similar to potassium because they are both alkali metals in the same group.
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