Periodic Trends

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12 Terms

1

atomic radius

distance from center to the outermost region

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2

ionic radius

distance from center to the outer most region in ion

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3

ionization energy

the minimum energy required to remove 1 mol of electrons from 1 mol of neutral gaseous atoms in

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4

electron affinity

The change in energy released which accompanies addition of an electron to an atom in gaseous state

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5

electronegativity

relative attractions that an atom has for a shared pair of electrons in a covalent bond

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6

atomic radius trend

decreases across period from left to right, increase down group from top to bottom

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7

ionic radius trend

radii of cations (e.g. Mg+) are smaller than their parent. radii of anions(e.g. Cl) are larger than their parent

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8

ionization trend

increases across period from left to right, decreases down a group from top to bottom

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9

electron affinity trend

increases across a period from left to right, decreases down a group from top to bottom

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10

electronegativity trend

increases across period from left to right, decreases down a group from top to bottom

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11

electron affinity equation

X(g)+e-=X^-(g)

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12

ionization energy equation

X(g)=X^+ (g) + e-

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