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Which metal is used to remove air from v...

Which metal is used to remove air from vacuum tube?

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for a metal that is used to remove air from vacuum tubes. Vacuum tubes are devices that require a vacuum to operate efficiently, and any air present can interfere with their function. 2. **Identifying Suitable Metals**: The metals that are typically used for this purpose are those that have a high affinity for gases, particularly oxygen and nitrogen, which are the primary components of air. 3. **Researching Properties of Metals**: Calcium and barium are two metals known for their strong reactivity with oxygen and nitrogen. This means they can effectively react with these gases and remove them from the vacuum environment. ...
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