C1 The Modern Periodic Table (page 106) Flashcards
What is the Periodic Table used for?
it helps you to see patterns in properties
What trends happen when you go down the Group 1 elements?
They react MORE VIGOROUSLY as you go down the group
How many elements, which all materials are made of?
about 100 elements (ish)
Why is the periodic table laid out in order of Increasing Atomic (proton) number?
Arranging them like this means there are repeating patterns in the properties of the elements.
(the properties are said to occur periodically, hence the name, periodic table).
Where are Metals and Non-metals found of the periodic table?
Metals are found to the left
Non-Metals are found to the right
Elements with similar properties form columns. What is the name given to these columns
These vertical columns are called GROUPS
What does a Group Number tell you?
How many Electrons there are in the Outer Shell.
eg: Group 1 elements all have ONE electron in their outer shell.
and Group 7 all have 7 electrons in their outer shell.
the only exception to the rule is Group 0, Helium has TWO electrons in their outer shell
So all elements in the same group are likely to react in a similar way
Group 1 elements are, Li, Na, K, Rb, Cs, Fr
what do this goup tell you?
They’re all metals and they react in a similar way
What trends do Group 7 have as you go down the group?
The reactivity decreases as you go down the group.
What are the Rows called on the periodic table?
They are called Periods.
Each new period represents another full shell of electrons
The Periodic table is organised into Groups and Periods, what do this allow us to see?
It allows us to see Trends in both reactivity and Properties.
This means we can make predictions on how reactions will occur.
Using a periodic table (page 106 of your science book) state how many electrons Beryllium has in its outer shell?
2
Chlorine reacts in a similar way to Bromine, suggest a reason why?
Both Chlorine and Bromine are in Group 7 and so have the same number of electrons in their outer shell
Sodium readily forms 1+ Ions, suggest what Ions Potassium forms and explain why?
Eg; Postssium forms 1+ Ions as it’s in the same group as Sodium, so will react in a similar way
