Do elements become more metallic or less metallic as you (a)...

Name: Problem 101, Chapter 11: Introductory Chemistry: An Active Learning Approach
Uploaded: 2020-11-06T05:02:17-08:00
Duration: 45 s
Channel: Kim Trang Nguyen
Description: Do elements become more metallic or less metallic as you (a) go down a group in the periodic table, (b) move left to right across a period in the periodic table? Support your answers with examples.

Do elements become more metallic or less metallic as you (a) go down a group in the periodic table, (b) move left to right across a period in the periodic table? Support your answers with examples.

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Key Concepts

Period Trends in the Periodic Table

When moving from left to right across a period, the metallic character decreases because the effective nuclear charge increases, pulling electrons closer to the nucleus. This stronger attraction makes it more difficult for atoms to lose electrons, thus leading to less metallic and more nonmetallic behavior.

Group Trends in the Periodic Table

As you move down a group in the periodic table, elements generally become more metallic due to an increase in atomic size and electron shielding. This results in lower ionization energies, making it easier for atoms to lose electrons and exhibit metallic properties.

Metallic Character

Metallic character refers to how readily an element can lose electrons to form positive ions, which is influenced by properties such as ionization energy, atomic radius, and electron shielding. It is a measure of how 'metal-like' an element is and includes properties like conductivity, luster, and malleability.

Periodic Trends

Periodic trends describe how various properties of elements change predictably across the periodic table. Understanding these trends allows for the prediction of physical and chemical properties, such as metallic character, based on an element's position in the table.

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