The Periodic Table
Who is the father of the Periodic Table?
Dmitri Mendeleev
What is the 1st column on the periodic table (not including hydrogen) called?
Alkali Metals
What group number is the oxygen family?
Group 16 or 6A
Why did Mendeleev develop the periodic table?
To group elements in terms of chemical properties
What does atomic radius measure?
the distance from the nucleus to the nucleus and divided by 2
What are the horizontal rows called?
Periods (1-7)
List two characteristics of metals
conductive of heat & electricity, ductile, malleable, high luster
What is group 18 or 8A called?
Noble gases
What is periodic law?
elements arranged by atomic number gives physical and chemical properties varying periodically
How does atomic radius change across a period and down a group?
It is smaller to the right and it is larger down the group
What are the vertical columns called?
Groups, Families (1-18)
What group is the Boron family?
Group 13 or 3A
What is the name of the family for elements #57-71?
Lanthanides
What is ionization energy?
the amount of energy needed to remove and electron from a gaseous atom
How does ionization energy change down a group and across a period?
decreases as you move down a group
increases as you move from left to right across a period
Elements are put into rows by increasing _____
Atomic Number
What is group 17 or 7A called?
Halogens
What are groups 3 - 12 called?
Transition metals
What is electronegativity?
the ability of an atom in a bond to pull on the electron
What is the least electronegative stable element?
Cesium (Cs)
How are certain elements in a group similar in regards to physical and chemical properties?
They react with other elements in similar ways. They may share similar color, metallic character, etc.
What is group 2 called?
Alkaline earth metals
What is the family for elements #89-103?
Actinides
What is the most electronegative element?
Fluorine (F)
What is the trend for electronegativity as you move down a group?
decreases as you move down a group