Question

Q 1. Found 10 man made element
Q 2. Why copper is use in wire why not aluminium​

Answer 1

ANSWER:

1. All elements with atomic numbers 1 through 94 occur naturally at least in trace quantities, but the following elements are often produced through synthesis. Technetium, promethium, astatine, neptunium, and plutonium were discovered through synthesis before being found in nature.
2. Copper wiring has a high tensile strength to protect against breakage as well as other forms of physical damage. Copper wiring also has a lower thermal expansion coefficient than its aluminum counterpart. In other words, it doesn't expand as much as aluminum wiring when exposed to heat.

Explanation:

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