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atomic number shows the number of protonsand proton number = the number of electrons so the overall charge of an atom is neutral.

work out in parts / ratio firstly work out how much one pencil costs, 50p divide by 5 = 10p1 pencil = 10p therefore, 2 pencils = 10p x 2 = 20p

All radio active decay is random. In any radioactive substance each specific nucleus has a chance of decaying at one specific point in time. However we can't predict when this is going to happen. Instead...

The law of demand states that quantity purchased varies inversely with price. In other words, the higher the price, the lower the quantity demanded and vice versa. This occurs because of diminishing margi...

NaOH is an ionic compound with strong electrostatic attraction between the oppositely charged ions. This means the melting point is high, as the bonds ne...