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Both sodium and magnesium have metallic bonding between atoms. Outer electrons become delocalised and float freely between the positive ions. The positive ions attract the negatively charged electrons so ...

An increase in temperature increases kinetic energy of particles, so collision frequency increases and more enzyme-substrate complexes are formed, therefore rate of reaction increases. The rate of reactio...

Angela wants to bake a cake. She needs:250g flour250g sugar3 eggs125g butterEach costs:1kg flour 90p1kg sugar £1.206 eggs £1.15250g butter xShow your working.(0.25 x 0.9) + (0.25 x 1.2) + (0.5 x 1.15) + 0...

Electronegativity increases across a period because the atomic radius decreases (i.e. the valence electrons are closer to the nucleus and experience a higher attraction). This is because there are more pr...

A perfectly competitive market structure possess 4 defining characteristics. 1- Homegenous goods (all goods produced by different suppliers are of same quality and form, eg. Oranges) 2. No barriers to ent...