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Chemical Bonding 1
Question | Answer |
---|---|
octet rule | tendency for non-metal atoms to gain enough electrons to make a complete set of eight valence electrons. |
duet rule | hydrogen can accomodate only two electrons |
oxidation and reduction | metals are oxidized by non-metals, and non-metals are reduced by metals. Oxidation: loss of electrons. add a + Reduction: gain of electrons. add a - |
metals and non-metals and their electrons | Metals tend to loose their valence electrons to form positive ions(cations). Non-metals tend to gain electrons to form negative ions(anions) |
ionic bond | The attractive force between opposite charged ions. |
Na+ | Sodium ion |
Atoms | neutral, same number of protons and neutrons |
Ions | not neutral, they carry either a positive or negative charge. They have a + or - in front of the element. |
properties of ionic compounds | pure ionic compounds are only solid at room temperature. metals on the left side of periotic table react with non-metallic metals on the right (except the noble gasses) to form stable crystalline solids. |
dissociate | ionic compounds dissolve in water. the ions dissociate. |
electrolyte | a substance that dissolves in water to give a solution that conducts electricity. |
covalent bond | a shared pair of electrons in the molecule |
molecule | is an electrically neutral cluster of two or more atoms joined by shared pairs of electrons (covalent bonds) that behaves as a single particle |