Chemistry 1 - 2022 Flashcards
How are elements ordered in the periodic table today?
Increasing atomic number (by proton number)
How are the elements organised?
Into groups and periods
Why is the table called periodic?
Because the properties of elements repeats at regular intervals giving them similar chemical properties
How were elements ordered before the modern table?
By weight
What did mendeleev do when he designed his table
Kept similar property elements together and left spaces where elements were yet to be discovered
What is an ion?
An atom which has become charged by either losing or gaining an electron
What type of ion do metals form?
Positive ions only
What type of ion do non-metals form?
Negative ions only
Where are metals found?
On the left of the ‘stairs’
What are the properties of metals?
Strong, malleable, ductile, conductive, shiny and sonorous
What do all elements in group 2 have in common?
They have 2 electrons in their outer most shell
What all elements in period 2 have in common?
The electrons fill up the second shell
What is special about group 0?
They have complete outer shells and are very unreactive.
What happens down the group 0 in terms of boiling point?
Boiling point increases down the group
What happens to the reactivity down group 1?
Reactivity increases
