Question

this is magnesium ribbon.
magnesium ribbon is composed of magnesium atoms. its ribbon shape is created by heating solid magnesium metal to high temperatures, then passing the molten metal through a special mold with a narrow opening. solid magnesium ribbon is easily bent or cut into smaller pieces; however, it cannot be physically separated into more than one substance or chemically decomposed into simpler substances.
describe and classify magnesium ribbon.
magnesium ribbon is composed of only one type of atom and cannot be chemically decomposed, so it is an element.
magnesium ribbon is composed of atoms of two or more different elements in a fixed ratio and can be chemically decomposed, so it is a compound.
magnesium ribbon is composed of two or more substances that can be physically separated and are evenly distributed, so it is a homogeneous mixture.
magnesium ribbon is composed of two or more substances that can be physically separated but are not evenly distributed, so it is a heterogeneous mixture.

Explanation:

The problem is about classifying magnesium ribbon. The key points are:

• Magnesium ribbon is composed of only magnesium atoms.
• It cannot be chemically decomposed into simpler substances.
• Elements are substances composed of only one type of atom and cannot be chemically decomposed.
• Compounds are composed of two or more different elements in a fixed ratio and can be chemically decomposed.
• Homogeneous mixtures are composed of two or more substances that can be physically separated and are evenly distributed.
• Heterogeneous mixtures are composed of two or more substances that can be physically separated but are not evenly distributed.

Answer:

Magnesium ribbon is composed of only one type of atom and cannot be chemically decomposed, so it is an element.