本题目来源于试卷: Classification of Matter A.1 Periodic Table Elements Classification，类别为 IB化学
[单选题]
Which statement regardim tuvy++11m ctng t.):qbes i;h1f pq8cxxhe periodic table is true?
A. Atomic radius increases across a period
B. Selenium (Se) has a higher ionization energy than sulfur (S)
C. Nonmetal oxides produce acidic solutions when dissolved in water
D. Copper (Cu) is considered to be more metallic than cesium (Cs)
参考答案: C
本题详细解析:
Explanation: Atomic radius and metallic character decrease across a period. Ionization energy decreases down a group due to increased shielding.
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