periodic table Flashcards
whats ionization energy
Energy required to remove an electron
whats electronegativity
Tendency for an atom to attract an electron when the atom is part of a compound
whats atomic radius
½ the distance between two nuclei of the same element
metals
good conductors of heat and electricity, malleable
nonmetals
not good conductors of heat and electricity, brittle
metalliods
have properties of metals and properties of nonmetals depending on changing conditions
How many TOTAL electrons can be held in level 1, 2, 3, 4-7
level 1- 2 level 2- 8
level 3- 18 level 4- 32
name 4 orbitals
s, p, d, f
whats an atomic orbital
A region of space in which there is a high probability of finding an electron
octet rule ?
Atoms react by gaining or losing electrons to acquire a noble gas configuration (8 valence electrons)
what do elements in a same group have in common ?
chemical properties (so reactivity)
whats periodic law ?
when elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.
which group of nonmetals is the most reactive
halogens (group 17)
what do we call the Group B elements
Transition metals, Lanthanide and Actinide series
whats a period & a group in the periodic table ?
period- rows
groups- columns
what did Seaborg do for the periodic table ?
separated lanthanide and actinide into their own group
what did Moseley do for the periodic table ?
english scientist who rearranged the periodic table by atomic number
based on Mendeleev, what was the periodic table arranged by?
atomic mass
What did the empty spaces in the periodic table (of Mendeleev represent?)
undiscovered elements
whats the name for group 1 / 1A
alkali metals
whats the name for group 2 / 2A
alkaline earth metals
whats the name for group 17 / 7A
halogens
whats the name for group 18 / 8A
noble gases
