I do not uderstand the meaning of Eka - Boron . What is the meaning of Eka?
Well, we owe this term to old Mendeleev......
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In the context of the periodic table, "Eka-Boron" would refer to a hypothetical element that would be directly below boron in the table and have similar chemical properties. "Eka" is a Sanskrit prefix meaning "one" or "first."
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The term "Eka" originates from the Sanskrit language, where it means "one" or "the next one." In the context of the periodic table, the prefix "Eka" was historically used by the Russian chemist Dmitri Mendeleev to denote the predicted properties of elements that had not yet been discovered but were believed to exist based on the periodic patterns of known elements.
For example, Mendeleev predicted the existence and properties of certain elements based on their expected similarities to adjacent elements in the periodic table. He used the prefix "Eka" followed by the name of the known element to denote these predicted elements. When these elements were later discovered and confirmed, they were given their own names.
Specifically, "Eka-Boron" refers to the element that Mendeleev predicted would have similar properties to boron but would have an atomic mass one unit higher. This prediction eventually led to the discovery of the element scandium, which indeed exhibits similarities to boron in certain chemical properties.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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