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which is a substance?
A. Padlock
B. Key
C. Copper
D. Solder​


Sagot :

Which is a substance?

A. Padlock

B. Key

C. Copper

D. Solder

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Copper

is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.