Chemistry-periodic properties-ch 5 objectives
1. Define: alkali metal, electron affinity, electronegativity, halogens, transition metals, ionization energy, periodic law, group, period, atomic radius, alkaline earth metals, noble gases
2. Know how atomic radius, electron affinity, electronegativity and ionization energy trend across a period and down a group and be able to give a simple explanation of why the property trends the way it does in terms of the nucleus' ability to attract/hold onto electrons. (factors: strength of nucleus, distance of electrons from nucleus)
3. Given a list of 3 or 4 elements, be able to rank from largest to smallest atomic radius, ionization energy, electron affinity and electronegativity.
4. Mendeleev: first periodic table, arranged by atomic mass
Moseley: modern periodic table, arranged by atomic number
5. Be able to find an electron configuration on a periodic table and determine how many valence electrons an element has, as well as be aware that across a period, element's valence electrons are on the same energy level. Also know that the number of valence electrons is the same for every element in a column (the transition metals present some challenges)
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