Matter and Chemical Change Flashcards
(25 cards)
What material did people use for weapons and tools before metal?
Stone
After stone what did they use
Metal
What after metal
Bronze
What was after bronze
Iron
What did Democritis do
Used the word Atmos for the smallest particles that cannot be broken down anymore
What did Aristole do
Belived everything was made up of fire,water,earth,water
What is alchemy
Pseudo science that isnt real since its not based on facts, carried out by half scientists and half magician
Who is Al-Razi
Discovered the change of state to create plaster of paris
Who is Andreas Libau
Published Alchemia the first ever chemistry book high lighting the chemistry accomplishments
Who is Robert Boyl
Interested in the properties of gas and their behaviour under pressure
Who is ANTOINE LAURENT LAVOISIER
Known as father of modern chemistry and created a naming system to name different elements
Who is John Dalton
Made the first model of an atom and that each atom had a different weight and no two atoms weighed the same
Who is J.J. Thompson
He was the first person to discover a subatomic particle and called it an electron
Who is Hantaro Nagoka
Created a model that looks like a solar system
Who is Ernest Rutherford
Won nobel prize, Using thompsons model he conducted experiments to prove there is a small energetic core in the middle of an atom
Who is Niels Bohr
Furthered the model of an atom with noting electrons more in orbits ( electron shells ) and jump the orbits by losing or gaining energy
Who is James Chadwick
Discovered the nucleus has protons and neutrons and the neutrons have the same mass as the proton but without the charge
What are 4 indicators a chemical change has occurred
Colour change
Odour
Gas created
Change in temp
Examples of
Atomic Name
Atomic Symbol
Atomic Number
Atomic Mass
Hydrogen
H
1.008
1
What are the charges of Protons, Neutrons, and Electrons
Protons = positive
Neutrons = no charge
Electrons = negative charge
What is a group, family, and period
Group is vertical columns
Period is horizontal rows
Family is different types of metal
How to find number of neutrons in an atom
Subtract atomic number from atomic mass
What unit do we use to measure the weight of an atom
Atomic Mass Unit
What did berzelius and mendeleev do to the periodic table
Berzelius came up with chemical symbols and formulas
Mendeleev organized the elements by their properties
