Element - pure substance that can not be broken down, Mixture - two or more substances that have been physically combined, Compound - two or more elements that are chemically combined, Molecule - two of the same elements chemically combined, Matter - anything that has mass and occupies space,

Understanding Matter

طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

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