Pure substances and Mixtures
Chex Mix is an example of what?
Heterogeneous Mixture
What is evidence of a chemical change?
something being produced like bubbles or heat
What are the three subatomic particles that make up an atom?
Protons, Neutrons, and Electrons
What is the energy of motion?
Kinetic Energy
What state of matter has very loosely packed particles?
Gas
Components in a mixture do what with their properties?
They keep them
What can only be observed by performing a chemical reaction?
A chemical property
What part of the periodic table organizes elements by similar properties?
Families or Columns
Kinetic + Potential energy =
Mechanical Energy
What kind of volume and shape does a solid have?
Definite
What is a pure substance made up of only one thing?
Element
If you take a bucket of paint and paint a white wall green, what has happened here?
Physical Change
If an atom has 35 protons and 40 neutrons, what is the atomic mass?
75 amu
Chemical, gravitational, elastic, and nuclear are all examples of what kind of energy?
Potential energy
What is required to change the state of matter?
giving more energy or losing energy (give or take away heat)
How many elements are listed?
Li, CO2, Mg, Pb
5
Boiling Point, density, viscosity are all examples of what?
Physical Properties
If an atom has an atomic number of 53 and is neutral, how many protons and electrons does it have?
53
What happens to potential energy as kinetic energy increases?
It decreases
What do you start with in a chemical reaction and what do you end with?
Start = Reactants
End = Products
How many compounds are listed?
NaCl, C, CO, H2O, Li
3
A bike sits outside for a year and rusts over time. What has occurred here?
A chemical change
If an element is in row or period 7, how many energy levels does it have?
7
As mass and height increase, what also increases and what decreases?
Potential increase and Kinetic decreases
What does the law of conservation of matter state?
Matter is neither created or destroyed, only transformed.