Regular variation in the properties of an element with increasing atomic number
What is periodic trend?
200
Physical and chemical properties of the elements recur in a systematic and predictable way when the elements are arranges in order of increasing atomic number
What is the periodic law?
200
The distance between the nucleus of the atom and its outer most electron.
What is atomic radius?
300
Who was Glenn Seaborg?
He discovered plutonium.
300
the size of the atom after it becomes an ion
What is ionic size?
400
What "blocks" can be found in the periodic table?
S-,p-,d- and f-
400
The amount of energy required to remove an electron from its current atom/molecule?
What is ionization energy?
500
What is the oxidation number of Cl?
-1
500
amount of energy released when an electron is added to a neutral energy