chemistry Flashcards
Safety glasses
Eye protection to protect eyes from the impact of foreign objects or chemicals.
Laboratory
A place where scientific experiments occur.
Bunsen burner
A piece of lab equipment used to heat substances
Apparatus
A set of equipment needed for a particular purpose
Parallax error
Error caused by not having your eye directly in line with the measurement
Matter
Anything that has mass and takes up space
Compressibility
the measure of how much a given volume of matter decreases when placed under pressure
Condensation
The change of state from a gas to a liquid
Vaporisation
the changing of a liquid to a gas
Melting
The change in state from a solid to a liquid
Sublimation
A change directly from the solid to the gaseous state without becoming liquid
Deposition
Change from a gas directly to a solid without becoming a liquid
Expansion
the act of increasing the size or volume of a substance
Contraction
the act of decreasing the size or volume of a substance
Kinetic Theory of Matter
states that all of the particles that make up matter are constantly in motion
Atom
Basic unit of matter
Molecule
A group of atoms bonded together
Proton
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
Neutron
A subatomic particle that has no charge and that is found in the nucleus of an atom
Electron
A subatomic particle that has a negative charge
Element
A pure substance made of only one kind of atom
Periodic Table
A chart of the elements showing the repeating pattern of their properties
Atomic Number
the number of protons and electrons in the nucleus of an atom
Mass Number
the total number of protons and neutrons in the nucleus of an atom
Nucleus
The centre of an atom that contains the protons and neutrons
Compounds
2 or more elements chemically combined
Mixtures
A combination of two or more substances that are not chemically combined
Homogeneous
A type of mixture that is of uniform concentration throughout
Heterogeneous
A type of mixture that is not of uniform concentration throughout.
Chemical formula
Symbols that show the elements in a compound and the ratio of atoms
