객관식
Which classification best describes the element calcium (Ca) in the fourth period of the periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
객관식
Which pair of elements from the following list are expected to have the most similar chemical behavior based on their position in the periodic table: barium, silicon, aluminum, strontium, osmium, beryllium?
A
Osmium and beryllium
B
Silicon and aluminum
C
Beryllium and aluminum
D
Barium and strontium
검증된 단계별 안내1
Step 1: Understand that elements in the periodic table exhibit similar chemical behavior when they are in the same group (vertical column) because they have the same number of valence electrons.
Step 2: Identify the groups of each element given: Barium (Ba) and Strontium (Sr) are in Group 2 (alkaline earth metals), Beryllium (Be) is also in Group 2, Aluminum (Al) is in Group 13, Silicon (Si) is in Group 14, and Osmium (Os) is a transition metal in Group 8.
Step 3: Compare the pairs based on their group positions: Barium and Strontium are both in Group 2 and close to each other in period, so they are expected to have very similar chemical properties.
Step 4: Recognize that Silicon and Aluminum are in different groups (14 and 13 respectively), so their chemical behavior differs more significantly.
Step 5: Conclude that the pair with the most similar chemical behavior is the one where both elements share the same group and similar properties, which is Barium and Strontium.
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