Atomic Mass & KMT Flashcards
The number of protons in an atom
Atomic Number
The same numbers of protons and electrons equals…
Atomic Number
Protons + Neutrons equals…
Mass Number
Mass number – atomic number equals…
Your neutrons
Anything that has mass and takes up space
Matter
What are the two types of matter?
Mixture and Pure
Matter that is pure can be what two things?
Compound and element
Give an example of a compound.
Water
Give an example of an element.
Gold- Au
Matter that is a mixture can be what two types?
Homogenous and heterogenous
Give an example of a heterogenous mixture.
Skittles
Give an example of a homogenous mixture.
Mountain Dew
A homogenous mixture is made up of what two things?
A solute and solvent
What is the universal solvent?
Water
What does KMT stand for?
Kinetic Molecular Theory
What is KMT?
Explains the properties of gases in terms of the energy, size, and motion of their particles
Fusion/melting…
Solid to liquid
Freezing…
Liquid to solid
Vaporization/ Boiling…
Liquid to gas
Condensation…
Gas to liquid
Sublimation…
Solid to gas
Deposition…
Gas to solid
What are the 4 changes of matter?
Intensive, extensive, physical, and chemical
Which change doesn’t depend on matter?
Intensive
Give an example of intensive.
Density
Give an example of extensive.
Weight, mass, volume, etc
Give an example of physical.
Color, taste, etc
Give an example to chemical.
Flammable
What is the formula for density?
D=m/v
Example problem:
D= 4g/ml V= 5ml Solve for M.
4=m/5
4x5
M= 20g
All atoms have what?
A nucleus
What is on the inside of the nucleus?
Protons and neutrons
Protons and Neutrons together are also called what?
Called the mass
Protons have what kind of charge?
Positive
Electrons have what kind of charge?
Negative
Neutrons have what kind of charge?
Neutral
The number of electrons equal…
The number protons and atomic number
All the same
How many does the first shell have?
2
How many do all other shells after the first have?
8 or more
The weighted average mass of the isotopes of that element
Atomic Mass
