Chapter 10 chem5 cards

Tagged as: anatomy

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1

Atomic radii

-Are difficult to measure to the outer energy level -are defined as half the distance between the nuclei of identical atoms that Are bonded together -as you move across a period atomic radii decrease due to an increase in the pull from the nucleus du

2

Ionization energy

-energy needed to remove an electron from a neutral atom -measured in kJ/mol -any process that results on formation of an ion is ionization energy -ion is an atom or group of bonded atoms that has or have a positive or negative charge -cation is po

3

Factors affecting ionization energy values

1. Nuclear charge 2. Shielding effect 3. Radius 4. Sublevel

4

Electron affinity

-energy change that occurs when an electron is acquired by a neutral atom or how much does an atom want from an electron -most atoms release energy when they gain an electron -measured on kJ/mol -halogens gain electrons most readily; this explains wh

5

Valence electrons

-electrons available to be added to,lost,or shared -only electrons in the outer s and p sublevels