number of protons
number of protons and neutrons
double covalent bond
sharing of two pairs of electrons between atoms of different elements
polar colvalent bond
unequal sharing between atoms of different elements
forms of an element whose atoms contain same number of protons but different number of neutrons
atoms or molecules that have an electrical charge
positively charged ion
negatively charged ion
sharing of electrons between atoms
chemical structures that contain more than one atom bonded together by shared electrons
AB → A + B
decomposotion reactions of complex molecules within cells
A + B →AB
the synthesis of newcompounds in the body
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