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A hydrogen bond requires both a lone pair of electrons on a O, N or F atom and a hydrogen atom. In water there are two lone pairs and two hydrogen atoms, allowing the formation of two hydrogen bonds. In a...

As grinding down the solid increases the exposure of particles on the surface, this increases the frequency of reactant particle collisions which then increases the rate of reaction.

Using a periodic table, you can find that: Molecular mass of carbon: 12Molecular mass of nickel: 59Formula mass of nickel oxide: 75 (=59+16)
Mass of all the reactants = 12+75=87Mass of the product we...

Because metals contain a ‘sea’ of delocalised electrons that are free to move around the metallic lattice, carrying charge.

Electronegativity is the power of an atom to attract electrons in a covalent bond towards itself. As we go down the group, electronegativity decreases because the atomic radii increases. The atomic radii ...