Chemistry key phrases topic 1.1 and 1.2

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First ionization energy
The energy required to remove one mole of electrons from one mole of gaseous atoms to create one mole of gaseous 1+ ions.
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Second ionization energy
The energy requiredto remove one mole of electrons from one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions.
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inoisation
The process of removing electrons from atoms to make positive ions.
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cation
Positively charged ion
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anion
negatively charged ion
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Atomic number
number of protons in the nucleus of an atom
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mass number
total number of protons and neutrons in the atom
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relative atomic mass
the weighted mass of all the atoms in an element compared to 1/12 of the mass of carbon 12 which has the mass of 12 exactly.
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relative isotopic mass
the mass of the isotope relative to 1/12 of the mass of carbon which has the mass of 12 exactly.
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Covelent
a shared pair of electrons
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ionic
electrostatic force of attraction between ions of the opposite charge
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metallic
positive metal atoms surrounded by a sea of delocalised electrons.
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half life
the time taken for half of the atoms in a radioactive isotope to decay or the time taken for the radioactivity of a radioisotope to fall to half its original value.
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isotope
atoms that have the same number of protons but a different number of neutrons
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ion
an atom with an overall positive or negative charge.
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Card 2

Front

The energy requiredto remove one mole of electrons from one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions.

Back

Second ionization energy

Card 3

Front

The process of removing electrons from atoms to make positive ions.

Back

Preview of the back of card 3

Card 4

Front

Positively charged ion

Back

Preview of the back of card 4

Card 5

Front

negatively charged ion

Back

Preview of the back of card 5
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