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8. which statement best explains why compounds have different properties than the elements that form them?

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They are bonded by atoms.

The atoms in a compound are held together by a chemical bond. The chemical bonds can be either covalent bonds or ionic bonds. Both the bonds are considered very strong bonds. These bonds are mainly formed by sharing of electrons or in the case when one of the elements making the compound donates electron to the other element. The nucleus of each atom attracts to form a strong bond. This property of attraction between the nucleus of the atoms actually helps in forming the chemical bonds.

Answer;

When elements form a compound, the bonds and structure of the elements change.

Explanation;

-Elements are substances (such as oxygen and hydrogen) that can't be split into simpler substances using chemical means. They contain only one kind of an atom. A compound on the other hand is a substance that is formed when two or more elements are chemically joined.

-A compound's properties may differ greatly from those of its component elements. For example; at room temperature both oxygen (O2) and hydrogen (H2) are gases, while water (H2O) is liquid. This means that when elements form a compound, the bonds and structure of the elements change. The atoms in a compound are joined chemically using chemical bonds, such as covalent bonds, ionic bond and hydrogen bonds among others.

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