Half the distance between adjacent nuclei
Decrease as move from left to right across a period
Increase as you move down a group.
What is Atomic Radius?
100
Group 18 and have 8 valence electrons which makes them the most stable of the elements. They do not bond naturally.
What is a noble gas?
100
Located on the right side of the periodic table, these are brittle, not ductile, and poor conductors of heat and electricity.
What is a nonmetal?
100
an atom or bonded group of atoms that has a positive or negative charge due to losing or gaining electrons.
What is an ion?
200
From left to right size of ions decrease (except group 15)
Size increases as you move down the group
What is ionic radius?
200
Group 17, have 7 valence electrons and the greatest electronegativity.
What are halogens?
200
Found on the left side of the periodic table, these are malleable, ductile, and good conductors of heat and electricity.
What is a metal?
200
Rows in the periodic table
What is periods?
300
The energy required to remove an electron from a gaseous atom
increases as move from left to right across period
Decrease as you move down a group
What is ionization energy?
300
Group 1 and have one valence electron which gives them high reactivity.
What are alkali metals?
300
These have both metal and nonmetal properties and are located along the stair step in the periodic table.
What is a metalloid?
300
Columns in the periodic table
What are groups?
400
The relative ability of an atom to attract electrons in a chemical bond
Decrease as move down a group
Increase as you move from left to right across a period
What is Electronegativity?
400
Group 2, have 2 valence electrons and very reactive
What are Alkaline Earth Metals?
400
Groups 3-12 in the middle of the periodic table.
What is a transition metal?
400
States that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.
What is periodic law?
500
This groups has the greatest electronegatvity.
What are Halogens?
500
Rare-earth elements and part of the inner transition metals
What are Lanthanides?
500
Groups 1-2 and 13-18 on the periodic table display a variety of properties that represent the table as a whole
What is a representative element?
500
Atoms tend to gain, lose, or share electrons in order to acquire a full set of eight valence electrons