Trends Flashcards
What happens to the properties of group 7 you go down the group?
Atomic radius increases
Ionisation decreases
Reactivity decreases
Oxidising power increases
What are all the elements of group 2?
Beryllium, Be
Magnesium, Mg
Calcium, Ca
Strontium, Sr
Barium, Ba
Radium, Ra
How does group 2 show similar chemical and physical properties?
Group 2 elements show similar chemical and physical properties as they they have two electrons in their outer shell
How do elements in group 2 react?
They react by losing one valence electron to form positively charged cation and in losing these electrons they ionises.
How can you determine the reactivity of an element?
You can determine the reactivity of an element by how easy it ionises. The easier, the more reactive
What happens to the properties of group 2 when you go down the group?
Atomic radius increases
Easier ionisation
More reactive
What are diatomic molecules?
Diatomic molecules are molecules composed only TWO atoms of the same or different chemical elements
What elements in group 7 exist as diatomic molecules?
Flourine, F
Chlorine, Cl
Bromine, Br
Iodine, I