scientist
Who created the first diagram of the atom?
John Dalton
6.022 time 10^23 (1 mole) is known as
Avogadro’s number
What are the states of matter
Solid, liquid,and gas
What is the definition of a mixture
Combination of two or More substances were they retain their properties (no chemistry)
Daltons model of the Atom
Just a sphere
Who was able to define an atom?
Antoine Lavosier
Atoms can not be created or destroyed
Daltons second idea
What does keeping a constant temperature and pressure do to a substance?
Nothing, it will not change the state of matter
mixtures were different parts can be seen
Heterogeneous mixture
JJ Thomson’s model
Plum pudding idea
Discovers the Neutron
James Chadwick
Matter is made up of atoms
Daltons first idea
Matter made of only one kind of atom
Element
Mixtures were the different parts can not be seen
Homogeneous mixture
what was Ruth fords gold foil experiment
He took a golf piece of foil and reflected a light off of it to see in what way the light reflected
Developed the Periodic Table
Dimitri Mendeleev
All atoms of a given element are identical
Daltons third idea
What is matter made up of?
Atoms
Definition of a substance
Matter that has the came composition and properties throughout, scientists clasif matter based on what is made of and how it behaves
What was Bohr’s model of hydrogen atom
A bunch of negative and positive protons in the center of two rings were electrons rotate around them
Developed law of conservation of mass
Antoine Lavoisier
Atoms of different elements have different mass
Daltons forth idea
What is the definition of an atom?
Building blocks for matter
What does a formula tell us
what elements are in a compound and how many of each atom exist in each molecule
What does quantum diagram look like?
Surrounded by a cloud of electrons, nucleus contains protons and electrons