Which statements describe elements?Elements can be separated using physical means.Elements are made of atoms with the same atomic number.Elements cannot be separated using ordinary chemical means.Elements may be represented by chemical symbols.Elements are made of two or more different types of atoms.

An element consists of atoms that all have the same atomic number, so B is correct. Elements cannot be broken down into simpler substances by ordinary chemical means, making C correct; they are also represented by chemical symbols, such as O for oxygen, so D is correct. Physical separation does not separate an element into simpler substances, and an element is not made of different types of atoms, so A and E are incorrect.

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