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Atoms in group 8 have a full outer electron shell. This means they don't have a tendency to lose, gain or share electrons with other elements to achieve a full outer shell. This explains why they don't fo...

The particles in a gas are widely spaced and move around freely. This means they will move to fit into any space but in liquids and gases the particles are more closely packed so cannot be compressed.

Alveoli have a large surface area, allowing more oxygen and carbon dioxide molecules to diffuse across at one time.

glucose + oxygen = carbon dioxide + water

the turning point of curve is when the gradient of the curve is 0. to find the gradient of the curve, we need to differentiate the curve.y = x² + 3x - 10dy/dx = 2x + 3gradient = 2x + 3 = 02x = ...