C2 The Periodic Table Flashcards
How can you find the group number by looking atoms structure
Number of electrons in the outer shell is the group number
What determines an atoms chemical properties
The number of electrons in the outermost shell
Why are the noble gases (group 0) unreactive
They already have a full outer shell meaning they dont have to share take or give any away
Trend in group 1 alkaline metals
The further down the easier to cut and the lower the boiling point and density
When group 1 metals react what happens to the group 1 metal atoms in term of electrons
They lose the lectron in the outer shell
Where does the electron the group one loses go to
Non metal
What is it called when losing or gaining the electrons
An ionic compound
What happens to the reactivity as you go down the alkaline metals (group 1)
It increases
What does electron shielding mean
As you go down each group the outermost shell gets further away from the nucleus meaning the easier it is to lose the electrons as there isn’t much attraction
Trend in group 7 the halogens
Melting point and boiling point increases as you go down the group as it goes from gas to liquid to solid
Trend in reactivity in group 7 the halogens
The reactions are less reactive as you go down the group which is the complete opposite to group 1 the alkaline metals
How are the halogens similar in their ionic compounds with metals
They all form ions with a single negative charge
How do halogens form convalent bonds
Sharing electrons with other non metals
Can a more reactive halogen displace a less reactive halogen and how
Yes from a solution of one of its salts
When and what did dmitri mendeleev do
63 elements arranged in order of atomic weight, but also grouped by similar chemical similarity (properties). He left gaps for undiscovered elements
