Vocabulary#1
the smallest unit of a chemical element—everything that exists is made up of these.
What is an "atom"?
A mixture of two or more substances that appears to be a single, uniform medium, with no visible separation between its components.
What is a "homogeneous mixture"?
The process by which a liquid turns into a gas.
What is "boiling"?
The extent to which a material dissolves in another substance to make a solution (like sugar in water).
What is "solubility"?
What is a "property"?
the temperature at which a liquid evaporates
what is a "boiling point"
Any form of matter with distinct, consistent properties.
A fluid state of matter that has no fixed volume or shape.
What is "gas"?
A state of matter that has a fixed volume and shape
What is a "solid"?
A change to a chemical that affects its physical properties but not its chemical makeup.
What is a "physical change"?
A chemical change that occurs when two or more substances combine to form a new substance.
What is a "chemical reaction"?
What is an "unbalanced chemical equation"?
A mixture of two or more substances that remain as physically separate substances.
What is a "heterogeneous mixture"?
A substance that has a constant proportion and arrangement-that is, a substance that only contains one type of atom (such as carbon) or has different atoms arranged in a regular way (such as table salt).
What is a "pure substance"?
Two or more atoms joined together.
What is a "molecule"?
What is a "melting point"?
Any of more than 100 substances that cannot by ordinary chemical means be separated into different substances.
What is an "elementary substance"?
A fluid state of matter that has a fixed volume but no fixed shape.
What is a "liquid"?
A chemical substance that appears at the end of a chemical reaction.
A chemical substance present at the start of a chemical reaction.
What is a "reactant"?
A liquid made up of a solvent and a dissolved substance.
What is a "solution"?
This refers to the amount of particles in a given amount of matter and how closely packed together they are.
What is "density"?
The process by which a material moves from solid to liquid.
What is "melting"?
law that states the total mass of the products of a chemical reaction is equal to the total mass of the reactants.
What is the "Law of conservation of mass"