Electron Affinity
When an element undergoes a chemical reaction, it either gains energy or loses energy. This gain or loss of energy is due to the phenomena that occur at atomic level. During reaction, atoms either gain electrons from other atoms or lose electrons to other atoms, and in that process, energy is produced.
P-Block Elements
Elements which are present on the right side of the periodic table are called p-block elements. In addition to the noble gases, they include the families of boron, mercury, nitrogen, oxygen and fluorine. These elements have diverse real-life implementations that we regularly experience around us.
Metals and Non-metals
The periodic table is composed of metals, semi-metals and nonmetal elements. The physical and chemical properties of metals and nonmetals differ from each other. The study of metals and nonmetals will help one to understand the appropriate application of the particular element.
![**Page Title: Understanding Shorthand Electron Configurations**
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**Activity: Shorthand Electron Configuration for Barium**
**Instructions:**
1. Click in the answer box to activate the palette.
2. Give the *shorthand* electron configuration for barium.
**Time Remaining: 02:29:37**
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*Additional Information:*
- The page is part of an educational module by McGraw Hill Education.
- You are on page 2 of a 30-page series.
- The interface includes navigation buttons for "Prev" (previous) and "Next" to move through the pages.
*Note:* When writing shorthand electron configurations, use the nearest noble gas as a reference point to simplify the notation.
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**Example:**
For barium, a possible shorthand electron configuration could start with [Xe], the noble gas preceding it, followed by its additional electrons.
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