Unit 1
What is the scientific method?
Define Matter
physical substance in general, as distinct from mind and spirit that which occupies space and possesses rest mass, especially as distinct from energy.
Who created the periodic table?
Dmitri Mendeleev
What is a nuclear reaction?
A type of chemical reaction in which the identity of the elements involved changes.
What are Heterogeneous Mixtures?
A mixture in which the parts are not evenly distributed throughout the entire mixture.
What is a Hypothesis?
A hypothesis offers a possible solution or answer to a problem or question that can be tested.
What are the six type of phase changes?
What are metaloids?
Elements that have chemical and physical properties that fall between those of metals and nonmetals
True or False- The photons of gamma radiation are very fast
True
What are Nonpolar solvents?
Solvents made of molecules that lack a positive or negative side because the charges within them are evenly spread out.
What is the difference between applied science vs pure science?
Pure science has broad branch of science that focuses on knowledge discovery, while Applied science has broad branch of science that focuses on knowledge us.
Define the term phase change.
Phase changes happen when you reach certain special points. Sometimes a liquid wants to become a solid. Scientists use something called a freezing point or melting point to measure the temperature at which a liquid turns into a solid. There are physical effects that can change the melting point.
Define chemical bond
A force of attraction that pulls two atoms together and allows them to form new substance.
What is a Beta Radiation?
Beta radiation is a type of radiation produced when electrons are emitted from the unstable nuclei of radioactive elements.
What does a solute do?
the substance that is dissolved in a solution