C1 Flashcards
What is an ion
An atom with the same number of protons and a different number of electrons
What does each shell maximum electron configuration
2,8,8
Define the term element
One type of ato
Describe properties of a oxygen
-low melting point
-doesnt conduct electricity
Why atoms form ions?
To gain a full outer shell of electrons
What is an electrons relative charge?
-1
What do opposite charges do?
Attract
How do ions form?
By transferring electrons
Who suggested the plum pudding model?
JJ Thompson
What is an isotope
Same number of electrons and protons but different numbers of neutrons
What does RAM stand for
Relative atomic mass
How could you separate salt and water?
Evaporation
What is an mixture?
Two or more elements or compounds not chemically combined
What are group 1 elements
Alkali metals
What are group 7 elements
Halogens
What are group 0 elements
Noble gases
What is sodiums (group 1) reaction with water?
Sodium hydroxide + hydrogen
What is the trend in reactivity down in group 1?
increases
How do halogen react?
More reactive halogens will displace the less reactive halogens
Why are group 0 very stable?
They have a full outer shell
What is it when atom does not react
intert
