물리전자를 공부중인데 고체의 금속결합과 화학결합에대해서 이해는가는데 이들의 전기적인특성과 기계적인특성을 잘모르겠습니다 전기적인특성은 열전도율같은걸 뜻하는건가요 기계적인 특성은 감도안옵니다 예를들어 설명해 주실 수 있나요 ㅠㅠ