Sceince Chem test Flashcards
What is heterogeneous
A physical mixture of a substance that is not even rly mixed and can be broken down using physical changes
What is homogeneous
A physical mixture of substances that is evenly mixed and can be broken down using physical changes
What is water vapor
Compund
What is dirt
Heterogenius
Pure silver
Element
whay is an alloid
Homogeneous
Are cations positive or negative
Poditive
Are anions negative or posithe
Negative
The differences between the Lewis structure and the bhor model(Luis structure)
The Lewis structure shows element symbol and valence electrons and only shows the groups
The differences between the Lewis structure and the bhor model(bhor model)
The bhor model shows info about nucleus, electron shells, and how many electrons are in each shell
What are isotopes
Atoms with the same number of protons and differnet number of neutrons
How do you find neutrons in isotopes
Subtracting atomic mass from atomic number
how do you find protons
Protons are the atomic number
what charge does protons have
postive charge
Who discovered the nucleus and protons
Rutherford
Who discovers electrons
Thompson
Who created the atomic theory
Jhon dalton
Who improved rutherfords model
Bhor
What charge do neutrons have
Neutrul charge
What charge do electyfrons have
Negative
Where are neutrons and protons loctaed
In the nucleus
What do protons have a mass of
1 and a charge of 1
What do electrons have a mass of
Basically 0 and a charge of -1
What do neutrons have a mass of
1 and a charge of 0
Do metal give or take electrons
Give
Do non metals give or take electrons
Take
What are the valence electrons
The 1s digits of group number
