Periodic Table Development
What was the first classification of elements?
Metal & nonmetal
What is the name of group 1 elements?
Alkali metals
Moving down a group, elements ___________ in size
Increase
Which type of element is more ductile?
Metal
Which type of bond has a higher melting point?
Ionic
Who developed the Law of Octaves
Newland
What is the group number of noble gases?
18
Moving left to right in a period, elements ______________ in size
decrease
State two methods to prevent corrosion
Painting, oil, galvanization, alloying
In covalent bonds, elements share electrons in order to satisfy which rule?
Octet
According to Dobereiner, if element A has a mass of 7 and element C has a mass of 39, what is the mass of element B?
23
Where are the metalloids located?
Diagonally between metals and nonmetals
Which element is more metallic? Mg or Ba
Ba
When a metal reacts with oxygen, what type of product is formed?
Metal oxide
What is another name for ionic bond?
Electrovalent
State modern Periodic Law.
What are the two series of Inner Transition Elements called?
Lanthanoids, actinoids
Which element is more electronegative? S or Cl
Cl
When a nonmetal oxide reacts with water, what is formed?
Acid
Draw a Lewis Dot diagram for Nitrogen (a diatomic element)
N (triple bond) N
Name two defects in Mendeleev's table that were solves by Mosely.
Position of isotopes, anomalous pairs, position of hydrogen
What makes the transition elements behave strangely?
Two outer shells are incomplete
Non-metallic character ________________ from top to bottom in a group.
decreases
What is the least reactive metal?
Gold
What is the special name given to ionic solids?
Crystal lattice