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
