chemistry - atomic model Flashcards
who created the atomic model?
English chemist Dr. John Dalton
What is all mater made up of?
Tiny particles called atoms
Atoms in an element are all ____
identical each element has its own types of atom
Atoms can neither be_____
Created or destroyed
In compounds, each atom of an element is always joined to_____
A fixed number of atoms of other elements
During chemical reactions, what do atoms do?
they rearrange to form new substances
Give an example of a physical property.
strength, colour, texture
Are physical changes reversible?
Yes they are easily reversible.
Are new substances formed during physical or chemical reactions?
Chemical
Did Mendeleev order the elements in atomic number or mass?
Atomic mass
What are the rows in the table called?
Periods
What are the columns in the periodic table called?
Groups
