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Electricity is the movement of charge and therefore something charged must move to carry this charge. graphite carbon atoms make 3 covalent bonds with the adjacent atoms however carbon has 4 electrons in ...
Isotopes are atoms of the same element that have the same proton number but different nucleon number. TRAIN OF THOUGHT --- Isotopes have the s...
After the balloon has been blown up with air it increased its size by 0.02 g (Final mass - initial mass = mass of the air).We are told that of oxygen takes up 21% of air. Therefore, we need to work out 21...
Sodium chloride is an ionic compound formed by the strong ionic attractions between positively charged sodium ions (which have lost one electron) and negatively charged chloride ions (which have gained an...
When these atoms react together Calcium chloride, CaCl2, is formed. Calcium atoms have two electrons in their outer shell, which can be determined from the fact they are in group 2 of the perio...
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