The Periodic Table Flashcards
1
Q
Group 1: Alkali Metals
A
- very reactive and soft
- React with water (stored with oil)
2
Q
Group 2: Alkaline Earth Metals
A
- reactive
3
Q
Group 3-12: Transition Metals
A
- hard metals
- High melting points
- Electrons can form a wide variety of compounds
4
Q
Group 17: Halogens
A
- Reactive nonmetals
- only group with all three states
- disinfectants
5
Q
Group 18: Noble Gases
A
- Unreactive and stable
- Full valence shells
6
Q
Lanthanoids
A
- inner transition elements in period six
- Sometimes referred to as rare earth metals
7
Q
Actinoids
A
- inner transition elements in period seven
- Form no stable isotopes
- All radioactive
- Elements beyond uranium are produced artificially
8
Q
groups or chemical families share properties
A
- partly due to electron structure
- Generally group number gives the number of valence electrons
9
Q
Modern periodic table
A
- first published by Dimitri Mendeleevin 1869
- 63 known elements at the time
- Organized based on atomic masses and properties
10
Q
other non- metals
A
- non-metals that are not part of the halogens or noble gases
- Most common elements in the tissues of living organisms
11
Q
other metals
A
- includes main group metals
- common and useful
12
Q
Lewis Symbols
A
- diagram of an atom using dots to represent electrons
- Only valence electrons are shown
13
Q
Non-metals
A
- all three states
- form covalent bonds
- form anions
- non-conductive
14
Q
Metals
A
- form cations
- solids
- conductive
- Shiny
15
Q
Metalloids
A
- shiny
- solids
- Not conductive
- same properties of metals and nonmetals
