객관식
Which of the following diagrams correctly depicts the general trend for metallic character in the periodic table?
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10. Periodic Properties of the Elements
Periodic Trend: Metallic Character
객관식
Between which two elements is the difference in metallic character the greatest?
A
Rb and O
B
O and I
C
Rb and I
D
Li and O
E
Li and Rb
검증된 단계별 안내1
Understand that metallic character refers to how readily an element can lose electrons to form positive ions, which generally increases down a group and decreases across a period from left to right in the periodic table.
Identify the positions of the given elements on the periodic table: Li (Group 1, Period 2), Rb (Group 1, Period 5), O (Group 16, Period 2), I (Group 17, Period 5).
Recall that metallic character increases as you move down a group and decreases as you move from left to right across a period, so elements far apart in both group and period will have the greatest difference in metallic character.
Compare the pairs by considering both their group and period differences to estimate which pair has the largest difference in metallic character.
Conclude that the pair with the greatest difference will be between an element high in metallic character (like Rb) and one low in metallic character (like O), because Rb is a metal far down the group and O is a nonmetal near the top right of the periodic table.
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