Chapter 6: periodic trends Flashcards
Demitri Medeleeve
Creates a 20 element periodic table
arranged from least to most mass
every 8 elements properties repeat-law of 8
Law of 8
every 8 elements properties repeat.
Law of medeleev
properties of elements are regular in cycles when elements are arranged in orger of increasing mass.
Periodic Law
the physical and chemical properties of the elements are functions of their atomic #
Alkali metals
Group 1
Alkaline earth metals
group 2
Chalcogens
group 16
halogens
group 17
noble gas
group 18
main group elements
s and p block together
likes to loose electrons
metals
atomic radius trend
decrease across a period and increases down a group.
verticle change is more drastic
ionization energy definition
amount of energy it takes to remove an electron from its ground state
electron affinity definition
amount of energy it takes to add an electron
Both ionization energy and electron affinity trend
decrease down a group, increase across a period
Ionic size depends on…
nuclear charge, number of electrons, the orbitals.
The first ionization energy is needed to ….
remove 1st electron
the second ionization energy is needed to…
remove second electron
electronegativity definition
the ability to attract electrons to an atom or the need to satisfy the octet.
Electro negativity trend
the smaller it is= the higher
the bigger= the less
Who has the highest electronegativity
Flourine
