8.8 Chemistry Vocab Flashcards
the smallest unit of an element that maintains the properties of that element
Atom
a subatomic particle that has a negative charge
Electron
a subatomic particle that has a positive charge and that is located in the nucleus of an atom
Proton
In physical science an atom’s central region which is made up of protons and neutrons
Nucleus
The number of protons in the nucleus of an atom, the atomic number is the same for all atoms of an element
Atomic number
A subatomic particle that has no charge and that is found in the nucleus of an atom
Neutron
The mass of an atom expressed in atomic mass units
Atomic mass
A region around the nucleus of an atom where electrons are likely to be found
Electron clouds
A substance that cannot be separated or broken down into simpler substances by chemical means
Element
A substance made up of atoms of two or more different elements joined by chemical bonds
Compound
The smallest unit of a substance that keeps all the physical and chemical properties of that substance
Molecule
A bond that forms when electrons are transferred from one atom to another, which results in a positive ion in a negative ion
Ionic bond
A bond formed when atoms share one or more pairs of electrons
Covalent bond
A bond formed by the attraction between positively charged metal ions and the electrons around them
Metallic bond
A sample of matter either a single element or a single compound, that has definite chemical and physical properties
Pure substance
