Horizontal row in the periodic table
Period
Vertical column in the periodic table
Group
A repetition of properties occur when elements are arranged in order of increasing atomic number
Periodic Law
Type of element that is a good conductor of heat and electric current
Metal
Type of element characterized by the presence of electrons in the d orbital
Transition Metal
One-half the distance between the nuclei of the two atoms when the atoms are joined
Atomic radius
Type of ion formed by group 2A elements
Cation
Subatomic particles that are transferred to form positive and negative ions
Electrons
Ability of an atom to attract electrons when the atom is in a compound
Electro negativity
Energy required to remove an electron from an atom
Ionization energy
Which of the following elements is in the same period as phosphorous
Magnesium
Each period in the periodic table corresponds to
Carbon
The modern periodic table is arranged in order of increasing atomic
Number
Who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
Dimitri Mendeleev
Which of the following categories includes the majority of the elements?
Metals
Of the elements Pt, V, Li, and Kr, which is a nonmetal?
Kr
What category's of an element does an element belong if it is a poor conductor of electricity
Nonmetals
What element is 1s2 2s2 2p6 3s2 3p2
Silicon
What is true about the electron configuration of the noble gases?
Highest occupied s and p sublevels are completely filled
Elements that are characterized by the filling of p orbitals are classified as
Groups 3A through 8A
Which electron configuration is most likely to result in an element that is relatively inactive?
A filled highest occupied principle energy level
Which subatomic particle plays the greatest role part in determining the properties of an element?
Electron
What is a transition metal?
Copper
Group containing representative elements
AL MG LI
What is true about the electron configuration of the representative elements
The highest occupied s and p sublevels are partially filled
How does atomic radius change from top to bottom in a group on the PT
It tends to INCREASE
How does atomic radius change from left to right across a period on the PT
It tends to decrease
Atomic size generally
Decreases as you move from left to right across the periodic table
What element in the second period has the largest atomic radius
Lithium
What contributes to the increase in atomic size within a group in the PT as the atomic number increases
More shielding of the electrons by the highest occupied energy level
Smallest atomic radius
Chlorine
What is the charge of a cation
Positive
What is true about ions
Cations form when an atom lose electrons
What charges are given correctly
K+ Sr2+ O2-
What is the element with the lowest electronegativity value?
Cesium
What is the element with the highest electronegativity value?
Flourine
What element has the smallest ionic radius
Li
What is the energy required to move from an atom in the gaseous state called?
Ionization energy
For group 2A metals,which electron is the most difficult to remove
The third
Which of the following elements has the smallest first ionization energy?
Potassium
Which of the following elements has the lowest electronegativity
Lithium
Which statement is true about electronegativity
Generally increases from left and right across a period
Electronegativities of the elements on the right side of the same period tend to be
Higher
What decreases with increasing atomic number in group 2A
Ionization energy
Statement that correctly compares the relative size of an ion to its neural atom
The radius of an anion is greater than the radius of its neutral atom
What factors contribute to the increase in ionization energy from left to right across a period
An increase in the number of protons
As you move left to right across the second period of the periodic table
Ionization energy increases
Has the smallest first ionization energy
Aluminum
Two elements that have similar chemical and physical properties
Carbon and silicon
What is NOT true about ions
When a cation forms more electrons are transferred to it