Question

मछली की संरचनात्मक अनुकूलताओं का अध्ययन करना |
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Answer 1

Answer:

Not in hindi

Explanation:In chemistry, an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. The number of protons in the nucleus is the defining property of an element, and is referred to as the atomic number.