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7. They are very strong, durable and highly resistant to heat and other harsh substances
a. metal b. nonmetal c. metalloids​


Sagot :

Answer:

A

Explanation:

Metals have free electrons that are not bounded to the atoms. These electrons are free to move around within the metal, colliding with the metal atoms and transferring heat to them efficiently. This makes metals better conductors of heat than most other materials.