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Decreasing atomic radius across the periodic table.
- greater number of protons in the nucleus resulting in a greater nuclear charge.
- little/no change in ...
Alkanes are saturated because they contain only single covalent bonds. Alkenes are unsaturated because they do have double covalent bonds.
To alter the size of the pupil, so the correct intensity of light is allowed through. Enough light is let through to allow clear vision, but not so much light that the retina might become damaged.
Solid.
An enzyme is a globular protein that acts as a biological catalyst. They work by reducing the activation energy of chemical reactions, which increases the rate of reactions.
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