C2 The Periodic Table Flashcards
Size of nanoparticles
1 to 100 nanometres
Describe main properties of halogens
Low melting and boiling points
Soluble in water
Why ordering of elements changed overtime
New elements were being found and scientists needed to be rearranged by relative atomic mass
Which group is unreactive
Noble gases
Which group have low density
Group 1
Model for ordering elements
Configuration model
Why noble gases are unreactive
No electrons to lose, gain or share
Trend in boiling point noble gases
Increases
How the electronic structure of metals and non-metals are different
Metal atoms give away electrons
Non-metals gain electrons
Why periodic table was breakthrough of how to order elements
If an element appeared to be in the wrong place due to its atomic weight, he moved it to where it fitted
Why mercury is not a typical transition element
Possess an incomplete d-subshell
Properties of transition metals
Good conductors of heat and electricity
Malleable
High density
Use of transition metals
Iron is used to make steel, bridges and vehicles
