Atomic theory/periodic table Flashcards
Who originally came up with the atomic theory?
John Dalton
Where all of John dalton’s theories correct?
No
Can atoms be created or destroyed?
No
Are atoms tiny, hard spheres that cannot be broken into smaller parts?
Yes
They cannot be broken into smaller parts even if they are there
Are all atoms in an element identical?
No, there are Isotopes.
What is all matter made up of?
Tiny spheres called atoms
When did Dmitri Mendeleev produce the first version of the priodic table?
1871
Who created the first version of the periodic table?
Dmitri Mendeleev
What did Dmitri Mendeleev do?
Create the first version of the periodic table
How did Mendeleev organise his version of the periodic table
He arranged it by atomic mass
How is the modern periodic table organised?
By atomic number
What does the period number of an atom say about it?
Its number of shells
What does the group number of an atom say about it?
Its number of eletrons in the shell furthest from the nucleus
