Chapter 3 Vocabulary: Matter & Change

substances that produces hydroxide ions (OH-) in water

combination of two or more atoms

tiny atomic particle that has mass and a positive electric charge

force that holds the atoms of the element together in a compound

number of protons contained in an atom's nucleus

attraction of two atoms for a shared pair of electrons that hold the atom together

an atom of an element that has a different mass number than the element

combined number of protons and neutrons in the nucleus of an atom

solid that consists of densely packed atoms with a random arrangement and lacks crystals/has crystal that aren't visible

change of one or more substances into other substances

an atom that gains or loses an electron

positively charged center of an atom, made up of protons and neutrons and surrounded by electrons in energy levels

natural or artificial substance that cannot be broken down into simpler substances by physical or chemical means

homogeneous mixture who components cannot be distinguished and can be classified as liquid, gas, solid, or a combination

attractive forces between two ions with opposite charges

anything that has volume and mass

hot, highly ionized, electrically conducting gas

process by which a cooling gas changes into a liquid and releases thermal energy

tiny atomic particle that is electrically neutral and has about the same mass as a proton

substances composed of atoms of two or more different elements that are chemically combined

process in which a solid slowly changes to a gas without first entering a liquid state

regular geometric pattern of particles in most solids, giving a solid a definite shape and volume

solution containing a substance that produces hydrogen ions (H+) in water

tiny atomic particle with little mass and a negative electric charge, located in a cloudlike region around the nucleus

vaporization---change of state from a liquid to a gas, involving thermal energy

The smallest particle of an element that retains all the properties of that element

positive ions of metal held together by the negative electrons between them; allows metal to conduct electricity