Parts of the Periodic Table Flashcards
0
Q
Lanthanides
A
•mixed with common metals to make
- soft malleable
- good conductors
1
Q
Actinides
A
- Mainly radioactive elements
- synthetic or man made
- used in nuclear energy
2
Q
Rare earth elements
A
- Two rows pulled out at the bottom
- pulled so periodic table would fit on one piece of paper
- had more in common then the rest
3
Q
Noble gases
A
- group 18
- have full valence shell
- non-reactive,monatomic gases
- used as “neon” signs
4
Q
Halogens
A
- group 17
- 7valence electrons
- most reactive,volatile diatomic non-metals
- always combined
- disaffected tax and cleans teeth
5
Q
Oxygen family or calogens
A
- group 16
- 6 valence electrons
- oxygen needed for respiration
- contains most abundant element in earth’s crust
- stink=sulfur
6
Q
Nitrogen family
A
- group 15
- 5 valence electrons
- nitrogen makes over 3/4 of earths atmosphere
- nitrogen and phosphorus are both important in all living things
7
Q
Carbon family
A
- group 14
- 4 valence electrons
- has elements that are important in computers
- carbon found in all living things
8
Q
Boron family
A
Group 13
3 valence electrons
Aluminum was once rare and expensive as it was a non disposable metal
9
Q
Transition metals
A
Groups 3-12 Less reactive Harder metals Used for construction and jewelry First metal used "as metal"
10
Q
Alkaline earth metals
A
Group 2
2 valence electrons
Reactive metals that are always combined with non metals
Some are important minerals
11
Q
Alkali metals
A
Group 1 1 valence electron Most reactive metals Always combined Explosive with the contact of water Soft enough to cut with a butter knife
12
Q
Hydrogen family
A
Family of its own
Reactive gas
Diatomic
13
Q
Metalloids
A
Properties of both metals and non-metals
Found touching the zig zag line
Semi conductors
Shiny but brittle
14
Q
Non-metals
A
Dull Poor conductors Powdery Brittle right side of the periodic table
