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  3. 1. how many neutrons are there in oxygen? in hydro

1. How many neutrons are there in oxygen? In hydrogen? In nitrogen? 2. Distinguish between atoms and...

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Biology

1. How many neutrons are there in oxygen? In hydrogen?In nitrogen?

2. Distinguish between atoms and molecules and amongprotons, neutrons, and electrons.

3. Compare and contrast covalent bonds and ionicbonds.

4. Explain how polar covalent bonds allow hydrogen bondsto form, and provide an example.

7. Define pH scale, acid, base, and buffer. How dobuffers reduce changes in pH when hydrogen ions or hydroxide ionsare added to a solution? Why is this phenomenon important inorganisms?

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