Studied by 0 people
Looks like no one added any tags here yet for you.
Chemists used the _____________ of elements to sort them into groups.
Properties
Chlorine, bromine, and iodine have very similar _____________ properties.
Chemical
Mendeleev arranged the elements in his periodic table in order of increasing __________________________.
Atomic Mass
The periodic table can be used to predict the _____________ of undiscovered elements.
Properties
In the modern periodic table, elements are arranged in order of increasing _________________________.
Atomic Number
Periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their ____________ and ____________ properties.
Physical, Chemical
What are three broad classes of elements?
Metals, Nonmetals, Metalloids.
Metals are good conductors of ____________ and ____________ .
Heat, Electricity
The nonmetals of Group 7A are called _____________.
Halogens
What are the representative elements?
Elements in groups 1A through 7A that display a wide range of properties.
In transition metals, the highest occupied s sublevel and a nearby __________ sublevel contain electrons.
D
Cations are always ____________ than the atoms from which they form.
Smaller
Anions are always ____________ than the atoms from which they form.
Larger
The energy required to remove an electron from an atom is called ____________ energy.
Ionization
Electronegativity is the measure of the ability of an atom to attract ____________ in a chemical bond.
Electrons
The transfer of electrons between atoms forms ____________ ions and ____________ ions.
Positive, Negative
As you move down a group in the periodic table, ionization energy tends to ____________ .
Decrease
As you move from left to right across a period, ionization energy tends to ____________ .
Increase
The ____________ effect is caused by the repulsion between kernel electrons and valence electrons.
Shielding
What is the atomic radius?
Half of the distance between the nuclei of two atoms of the same element when the atoms are joined.
What is the most active metal?
Francium
What is the most active nonmetal?
Fluorine
The behavior of a metalloid can be controlled by changing ____________.
Conditions
The noble gases have electron configurations with filled ____________ and ____________ orbitals.
S, P
