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Ch.2 - Atoms & Elements
Chapter 2, Problem 70

Which pair of elements do you expect to be most similar? Why? a. nitrogen and oxygen b. titanium and gallium c. lithium and sodium d. germanium and arsenic e. argon and bromine

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Periodic Trends

Periodic trends refer to the predictable patterns observed in the properties of elements as you move across or down the periodic table. These trends include atomic radius, electronegativity, ionization energy, and reactivity. Understanding these trends helps in predicting the behavior and similarities between elements based on their positions in the periodic table.
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Group vs. Period Similarities

Elements in the same group (column) of the periodic table share similar chemical properties due to having the same number of valence electrons. This similarity often leads to comparable reactivity and bonding characteristics. In contrast, elements in the same period (row) may have different properties as they have different valence electron configurations.
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Metallic vs. Nonmetallic Character

The metallic and nonmetallic character of elements influences their properties and reactivity. Metals, typically found on the left side of the periodic table, are good conductors of heat and electricity, while nonmetals, located on the right, are generally poor conductors and have higher electronegativities. Understanding this distinction is crucial for predicting how elements will interact with one another.
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