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What is an atom

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Reference no: EM13151521

1. what is an atom? give some example of an atom found in the human body.
2. define an ion?
3. what are covalent bond and what types of atoms generally form these bond? give one example?
4. what type of bond is used to form Nacl? how does this type of bond differ from a covalent bond?
5. what type of bond is used to keep one molecule of DNA (one DNA stand) wound in an alpha helix around a second molecule or stand of DNA?

Reference no: EM13151521

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