matter: anything that occupies space and has mass.
physical properties: properties that can be observed and measured without changing the chemical makeup of the substance.
density: the mass of material within a given volume. Water: 1g/mL, 1g/cm^3.
freezing/melting point (of water): 0°C or 32°F.
boiling point (of water): 100°C or 212°F.
aqueous solution: water-based solution.
surface tension: shows the strong intermolecular force that holds water molecules together.
mixture: when two or more substances combine and the substances retain their individual properties. The components of a mixture can be separated by physical means, such as filtration and adsorption.
heterogeneous mixture: composition is not the same, or uniform, throughout. (not evenly distributed).
suspension: solid particles are large enough to settle out or can be separated by using filtration.
Tyndall Effect: the scattering of light that indicates that small, solid particles, are still in the water.
collid: the small, solid particles that remain still in the water. Make liquid cloudy.
homogeneous mixture: a mixture that is uniform throughout. (evenly distributed).
solutions: homogeneous mixtures. (such as salt solution)
solute: salt in a salt solution.
solvent: water in a salt solution; dissolving agent.
particulate level: the level of atoms and molecules.
atoms: building blocks of matter. all matter is made of atoms.
element: matter that is made up of only one kind of atom.
compound: a substance that is composed of the atoms of two or more elements linked together chemically in certain fixed proportions.
chemical formulas: represent compounds.
substance: all elements and compounds. has a uniform and definite composition, as well as distinct properties.
molecule: the smallest unit of a molecular compound that retains the properties of that substance (smallest representation of the substance) ex: H2O molecule represents water.
chemical bonds: hold atoms of molecules together.
molecular compound: such as H2O
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