Atomic Periodic Trends
Metals are good conductor malleable moderate to high melting points
Nonmetals are non conductors and non malleable brittle solids that can be some gases at r.t.
Metalloids are elements with metal and nonmetal properties.
Atomic size can be attributed to changes in the n outer shell or changes in the Zeff. (Larger the
Zeff the smaller the atom.)
Variation in Atomic Radius within a Transition Series
The atomic radii of transition elements tend to be about the same across a period with a few
unusual peaks, because Zeff remains approximately constant as Z increases across the
transition group portions of a period. Isoelectronic Ions their size decreases as their atomic number increases.
The minimum energy needed to knock off the outermost electron off a gaseous atom is always
endergonic process. This is known as IONIZATION ENERGY.
Electrons can also be knocked off as ions.
It is largely determined by the size of the atom. It decreases as atomic radii increase
Large size = low ionization energy.
Highest Energy= smallest size therefore
The energy change that occurs when an electron is added to an isolated atom in the gaseous
When e are on this side → it is exothermic and energy is on this side
It is endothermic when energy is on this side→ .N
Diamagnetic is weakly repelled by a ma