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Chemistry C4 C5 C6

An element is made of only one kind of atom
Group = vertical, group number corresponds to the number of electrons in most
outer shell
Period = horizontal, corresponds to number of shells in atom
Atomic number = number of protons / electrons

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Alkali > PH greater than 7
Acid + Metal hydroxide > Salt + Water
Acid + Metal oxide > Salt + Water
Acid + Metal carbonate > Salt + Water + Carbon dioxide
Acid + Metal > Salt + Hydrogen
Reactants = substances present before chemical reactions take place


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