Chapter 2 study guide Flashcards
anything that has mass and takes up space
matter
a characteristic of a pure substance that can be observed without changing it into another substance
physical property
A characteristic of a pure substance that describes its ability to change into different substances.
chemical property
A pure substance that can’t be broken down into any other substances by chemical or physical means
element
the basic particle from which all elements are made
atom
a force of attraction between two atoms when they combine
chemical bond
groups of two or more atoms held together by chemical bonds.
molecule
a pure substance made of two or more elements chemically combined in a set ratio
compound
shows the elements in the compound and the ratio of atoms
chemical formula
made of two or more substance that are together in the same place but not chemically combined
mixture
a mixture where you can see the different parts
heterogeneous mixture
a mixture where you can’t see the different parts
homogeneous mixture
an example of a homogeneous mixture
solution
any change that alters the form or appearance of matter but doesn’t make any substance in the matter into a different substance
physical change
a chemical reaction that occurs when a substance is transformed into a different substance
chemical change
that fact that matter isn’t created or destroyed in any chemical or physical change
law of conservation of matter
the ability to do work or cause change
energy
a measure of the average energy or random motion of particles of matter
temperature
the total energy of all of the particles in an object
thermal energy
a change in which energy is taken in
endothermic energy
a change in which energy is given off
exothermic energy
the energy stored in the chemical bonds between atoms
chemical energy
a form of energy that travels through space as waves
electromagnetic energy
the energy or electrically charged particles moving from one place to another
electrical energy
two metal strips that are places in a solution but do not touch.
electrode
a single kind of matter that is pure, meaning it always has a specific makeup and a specific set of properties
Substance
