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Set 4: Cross-Text Connections

Explanation

Answer: A

PASSAGE

Text 1 The periodic table organizes elements by atomic number. Elements in the same column, or 'group,' share similar chemical properties because they have the same number of valence electrons. Text 2 Hydrogen is located in Group 1 because it has one valence electron. However, unlike the other elements in this group (alkali metals), hydrogen is a gas and behaves more like a non-metal.

Based on the texts, why is hydrogen considered an anomaly in the periodic table?

A. It fits the electronic configuration of its group but lacks the corresponding physical properties.✓ Correct
B. It has no valence electrons.
C. It is a metal.
D. It is not an element.

Detailed Explanation

Text 1: Group = Same valence/Prop (Metals). Text 2: H has 1 valence (Group 1) BUT is gas/non-metal. Anomaly: Config vs Props.

Key Evidence:

• "located in Group 1"

• "unlike the other elements"

• "behaves more like a non-metal"

Why others are wrong: B (Has one.), C (Is gas/non-metal.), D (Is element.).

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