المادة وخواصها

[السيد سليم]

تختلف المواد عن بعضها فى كثير من الخواص مثل:
الكثافة:
هى كتلة وحدة الحجوم من المادة (كتلة 1 سم3 من المادة)
درجة الإنصهار:
درجة الحرارة التى عندها تتحول المادة من الحالة الصلبة إلى الحالةالسائة.
درجةالغليان:
هى درجة ا لحرارة التى عندها تتحول المادة من الحالة السائلة إلى الحالة الغازية.
خواص المادة:
- الصلابة
- التوصيل الكهربى
- التوصيل الحرارى
- النشاط الكميائى

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