Unit 1
What is an Atom?
Basic unit of matter
What happens to energy during the phase change of freezing?
Energy is released
What is a chemical reaction?
the actual, chemical transformation from one substance into another
When does a combustion reaction occur?
Occurs when a substance reacts with oxygen
a combination of two or more substances that can be separated through physical means
A Mixture
Two Main types of compounds?
Organic and Inorganic
What is an Ion
an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
chemical formula
term for the condensed form of listing the number and type of atoms in a compound
Nuclear Fission
type of nuclear reaction in which the nucleus of a heavy atom splits into two or more smaller nuclei that have masses of relatively similar size
Mixture which Parts are NOT not evenly distributed (Not well-mixed)
a heterogeneous mixture
Reactants Vs Products
______ Are materials that change in a chemical reaction.
______ Are substances formed by changes in a chemical reaction.
Define kinetic energy
the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
Chemical bond
a force that holds atoms or ions together in a fixed structure or unit
Woman of science who was born in 1878 and graduated from the University of Vienna
Lise Meitner
What two substances are produced in a neutralization reaction
water and an ionic compound