1 Flashcards
All elements in this group except hydrogen are
extremely reactive and highly flammable
alkali metals group 1
Slightly less reactive than the alkali metals
alkaline-earth metals
It has two valence electrons to get to stable electron
configuration
alkaline-earth metals group 2
Rare-earth elements
Lanthanides (Group 3: Bottom of the table)
Silvery white metals
Lanthanides (Group 3: Bottom of the table)
the occurrence of these elements is very
small (3 x 10-4% of the earth’s crust)
lanthanides
All elements in this family are radioactive
actinides
Only thorium and uranium occur naturally on Earth in substantial amount
actinides
They are not found naturally and are instead
synthetically produced by neutron bombardment or in particle accelerators
actinides
Hard shiny but malleable metals
transition metals
Good conductor of heat
transition metals groups 3-12
Four of the regular——— were known to the
ancients as: iron (ferrum), copper (cuprum), silver (argentum), and gold (aurum)
transition metals
Located between the transition metals (to the right) and metalloids (to the left)
Post-transition metals (Groups 13-17)
Due to their properties, they are also called “other” or “poor” metals (1)
Post-transition metals (Groups 13-17)
Have the classic characteristics of the transition metals, but they tend to be softer and conduct heat more poorly
Post-transition metals (Groups 13-17)
Represents transition from metals to nonmetals
Metalloids (Groups 13-17)
Can be defined as chemical elements whose physical and chemical properties fall in between the metal and
nonmetal categories
metalloids
Used as semiconductors
metalloids
Also known as semimetals or poor metals
metalloids
Mostly gasses including hydrogen
Non-metal groups (Groups 14-16)
Highly reactive, Combine with alkali to form salts
halogen grouo 17
Colorless Odorless Non-reactive Farthest to the right elements
Noble gasses (Group 18)
