Matter Flashcards
What is an aqueous solution?
An aqueous solution is a homogeneous mixture of particles dissolved in water,
What is a chemical change?
A change in the composition which results in the formation of new substance(s)
What is chromatography?
A technique in which mixtures are separated by difference in the component’s polarity.
What is a compound?
A substance composed of two or more elements chemically combined.
What is a diatomic element?
An element whose usual form consists of two atoms bonded together.
What is distillation?
The process in which the components of a mixture are separated by differences in their boiling points.
What is an element?
A substance which contains atoms of a single type (all having the same number of protons).
What is entropy?
A measure of the randomness or disorder in a system.
What is filtration?
The process of separating the insoluble components of a mixture from the soluble components.
What is heterogeneous?
A mixture in which the particles are not mixed uniformly throughout the mixture. Since the mixture is not uniformly mixed, various samples of the mixture can have different percent compositions.
What is homogeneous?
A sample of matter in which the particles are uniformly mixed or distributed throughout. A homogeneous sample of matter does not have visible parts and various samples should have the same percent composition.
What is matter?
Anything that has mass and volume.
What is a mixture?
A physical combination of substances.
What is a molecule?
Atoms covalently bonded together. A molecule is the smallest unit of a covalently bonded compound.
What is a physical change?
A change in a substance that does not affect its composition; a change in the form or appearance without changing the identity of a substance.
What is a precipitate?
A solid formed when two solutions are mixed together
What is a pure substance?
A compound or an element; A material in which the composition is the same throughout.
What is a solution?
A homogeneous mixture.
Which of the following particle diagrams represent an element?
Particle diagrams A and B represent an element. An element is a sample of matter that has only one type of atom; in a particle diagram, there should be only one shape (with the same color and size) to show the one type of atom present in the element.
Which of the following particle diagrams represents a compound?
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Particle Diagram C represents a compound. A compound is made up of two or more different elements chemically combined. In a particle diagram, a compound is represented by at least two different shapes connected to each other. All the groups of atoms in a sample of a compound should be identical to each other.
