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
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 some characteristics of transition metals
they are less reactive and harder metals
What are some characteristics of Halogens?
very reactive, volatile, diatomic, nonmetals
always found combined with another element in nature
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
Groups (1-18)
What group is the Boron family?
Group 13
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 family contains elements important to life and computers?
The Carbon Family
What family has a full valence shell?
Noble Gases
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)
Why are certain elements in the group have similar physical and chemical properties?
They have the same number of valence electrons
They will form the same kinds of ions
How much Nitrogen makes up the atmosphere and what family does this relate to?
3/4, Nitrogen Family
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