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Chapter 5

QuestionAnswer
mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing atomic masses
what are the radioactive elemets with atomic numbers from 90 to 103 in the periodic table called the actinide elements
what are the elements with atomic number 58 to 71 in the periodic table called the lanthanide elements
one half the distance between the nuclei of identical atoms that are bonded together is called the atomic radius
the principle that states that the physical and chemical properties of the elements are periodic functions of their atomic number is the periodic law
the person whose work led to a periodic table based on increasing atomic number was moseley
the most reactive group of the nonmetlas are the halogens
a positive ion is known as cation
a negative ion is known as anion
which is the reason that the atomic radius generaly increases with atomic numkber increases the atomic radius the number of energy levels increase
Created by: Frankie17