Basic Chemistry
The science of matter and how it changes
What is chemistry?
One of the three states of matter, it's the one that fills the volume of its container
What is a gas?
The chemical formula for water
What is H2O?
Another way of saying thermal energy
What is heat?
The center of an atom consisting of protons and neutrons
What is a nucleus?
The standard unit of measuring volume
What is a liter?
A substance made of at least two different elements
What is a compound?
The boiling point of water in Celsius (El punto de ebullición del agua en Celsius)
What is 100 degrees Celsius?
The amount of energy needed to start a chemical reaction
What is activation energy?
The subatomic particle with a negative charge
What is an electron?
This chart has all of the elements listed by atomic number
What is the periodic table of elements?
This type of mixture contains two or more phases
What is a heterogeneous mixture?
As temperature decreases, the speed of the molecules of water does this
What is decreases?
How much energy is required to vaporize a substance
What is heat of vaporization?
When an atom is unstable, this happens.
What is radioactive decay?
Physical, inorganic, organic, analytical, and bio are all types of
What is chemistry?
Mass/Volume
What is density?
As water changes from liquid to gas, this physical property remains constant
What is temperature?
The state in which an electron becomes when it gains energy
What is excited state?
The time it takes for half a sample of radioactive atoms to decay
What is half-life?
What all matter is made of
What are atoms?
A method of separating mixtures that takes advantage of differences in sizes of particles
What is filtration?
The specific heat capacity of water
What is 4.18 J/g*K?
A type of reaction in which the reactants lose heat energy to form the products
What is an exothermic reaction?
A type of nuclear reaction where a large unstable isotope breaks into smaller elements
What is fission?