The modern periodic table organizes elements according to this.
What is increasing atomic number?
100
Being shiny, malleable, and conductors are properties of this class of elements.
What are metals?
100
Elements in the same group share this characteristic with regard to their atomic structure.
What is the same number of valence electrons?
100
The noble gases share this characteristic with regard to their atomic structure.
What are full valence shells?
100
The trend for ionization energy on the periodic table is this.
What is ionization energy tends to decrease from top to bottom within a group and increase left to right from left to right?
200
The three classes of elements are these.
What are metals, nonmetals and nonmetals?
200
Being brittle, dull, and insulators are properties of this class of elements.
What are nonmetals?
200
The very reactive elements in group 1A are known as this.
What are alkali metals?
200
This is the trend on the periodic table with regard to atomic radius size.
What is increases top to bottom within a group and decreases from left to right across a period?
200
This the size of a cation relative to the atom from which they form.
What is smaller?
300
This class of elements are good conductors of heat and electric current.
What are metals?
300
Silicon, Boron, and Tellurium are examples of this class of elements.
What are metalloids?
300
The reactive elements in group 2A are known as this.
What are alkali earth metals?
300
Metals form this type of ion.
What are cations or positively charged atoms?
300
This is the size of an anion relative to the atom from which they form.
What is bigger?
400
This class of elements are poor conductors of heat and electricity.
What are nonmetals?
400
The vertical columns on the periodic table are called this.
What are groups?
400
The elements in group 7A are known as this.
What are the halogens?
400
Nonmetals form this type of ion.
What are anions or negatively charged atoms?
400
The ability of an atom of an element to attract electrons when the atom is in a compound is known as this.
What is electronegativity?
500
This class of elements have properties of both metals and nonmetals.
What are metalloids?
500
The horizontal rows on the periodic table are called this.
What are periods?
500
The nonreactive elements in group 8A are known as this.
What are the noble gases?
500
The energy required to remove an electron is known as this.
What is ionization energy?
500
This is the trend for negativity on the periodic table?
What is electronegativity values decrease top to bottom within a group and for representative elements, the values tend to increase from left to right across a period.