Name one property which atoms within living organisms have?
They have low atomic masses and combine together to form molecules (E.g O2) most of which are compounds (E.g CO2). These are held toegther by strong covalent bonds.
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What is the water content in living organisms?
50-90%
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Why is water a liquid whereas other substances of similar masses are gases?
Water is a dipolar molecule due to the difference in electronegativity values.
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What are neighbouring water molecules linked by?
Hydrogen bonds
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What is the dry mass of living organisms in the form of?
Carbohydrates, lipids, proteins and nucleic acids.
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Why is water a good solvent?
Water molecules are charged and so surround ions and other charged molecules, separating them in solution.
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Other cards in this set
Card 2
Front
Name six elements which occur in living organsims?
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