Matter Flashcards
Define atom
atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
Define element
A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number,
Define compound
1.
a thing that is composed of two or more separate elements; a mixture.
Define a solution
Solution |
dictionary.reference.com/browse/solution
Chemistry A mixture in which particles of one or more substances (the solute) are distributed uniformly throughout another substance (the solvent), so that the mixture is homogeneous at the molecular or ionic level. The particles in a solution are smaller than those in either a colloid or a suspension.
Define thermal energy
Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules. The atoms and/or molecules of a hotter object have greater kinetic energy than those of a colder one, in the form of vibrational, rotational, or, in the case of a gas, translational motion.
What is the difference between a colloid and a suspension?
- Suspension is a heterogeneous mixture, but colloid can be homogeneous or heterogeneous. - The major difference between the two is the diameter of the dispersed particles; the particles in a suspension are larger than the particles in a colloid.
How is being concentrated related to being diluted
Dilution is a reduction in the pH of a chemical (gas, vapor, solution). It is the process of decreasing the concentration of a solute in solution, usually simply by mixing with more solvent.
What are 4 clues that something has undergone a chemical change?
Temperature. Color. Smell.emission of gas
Define solute
A substance dissolved in another substance, usually the component of a solution present in the lesser amount.
Define solvent
a. A substance in which another substance is dissolved, forming a solution. b. A substance, usually a liquid, capable of dissolving another substance. 2.
