why do the elements in group 7 form ions with a single negative charge?
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Card 7
Front
which of the following substances are made of molecules? KCI, H2O, C2H6, MgO, CO2, NaNO3.
Back
Card 8
Front
why can the structure of a metallic element like copper be represented by lots of small spheres the same size packed together?
Back
Card 9
Front
write the correct formula for each of the following: lithium chloride, sodium oxide, calcium fluoride, magnesium hydroxide, sodium sulphate, calcium nitrate.
Back
Card 10
Front
why do ionic compounds have giant structures?
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Card 11
Front
explain why silicon (in group 4) has a giant structure.
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Card 12
Front
explain how the atoms in a piece of sodium metal are held together.
