Particles and Atomic Structures (Gases (Random movement, highest energy,…
Particles and Atomic Structures
A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. An element is a substance whose atoms all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number.
Random movement, medium energy, weak forces between particles, particles are touching
Random movement, highest energy, spaced apart, no forces between particles
No fixed volume or shape
Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration
Fixed particles and position, weak energy, strong forces between particles. And particles are touching.
Condensing: Decrease in energy
Freezing: Decrease in energy
Melting: Increase in enegry
Boiling: Increase in energy
solvent: A solvent is a substance that dissolves a solute
solute: the minor component in a solution, dissolved in the solvent.
solution: mixture composed of two or more substances
saturated solution: A saturated solution is a chemical solution containing the maximum concentration of a solute dissolved in the solvent
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.
An atom is the smallest unit of matter that has the properties of an element. It is composed of a dense core called the nucleus and a series of outer shells occupied by orbiting electrons. The nucleus, composed of protons and neutrons, is at the center of an atom.
If many grams of a solute will dissolve in 100g of water that solute is said to have a high solubility.
If few grams of a solute will dissolve in 100g of water that solute is said to have a low solubility.
Generally the solubility of solids increase with temperature. And the solubility of gases decrease.