Unit 4 Practice Test Flashcards
Mendeleev arranged the element in order of increasing
Atomic mass
Elements in today’s periodic table are according to
Atomic number
Who created today’s order of periodic table
Moseley
Majority of elements in periodic table
Metals
Elements in group 16 and 17 are classified as
Nonmetals
Metals on the periodic table tend to
Lose electrons and form cations
Atomic radius- goes down a group and reason
Increases due to more energy levels
What causes shielding effect to stay constant on periodic table?
Electrons are added to the same principal energy levels
As the elements of group 16 are considered from top to bottom on periodic table, ionization energy
Decreases
Si and Ga are used in computer chips because they are
Metalloids which make good semi conductors
Charge of a halogen ion would generally be
-1
Most reactive alkali metal
Rubidium
Most reactive non metal
Fluorine
4th period transition element which is in the center of hemaglonin molecules which transport oxygen in blood
Fe
Which block on periodic table contains most elements?
d block
Repetition of properties occurs when elements are arranged in order of increasing atomic number
Periodic law
Atomic radius
One half the distance between the nuclei of 2 atoms when the atoms are joined
Type of ion formed in group 2 elements
Cation
Electronegativity
Ability of an atom to attract electrons when the atom is in a compound
Noble gases
Elements in group 18 which are unreactive
Ionization energy
Energy required to remove an electron from an atom
