Atoms Vocab Flashcards
The smallest unit of an element that maintains the properties of that element
Atoms
a subatomic particle that has a negative charge
electrons
a subatomic particle that has a positive charge and is located in the nucleus of an atom
protons
a subatomic particle that has a neutral charge and is located in the nucleus of an atom
neutrons
In physical science, an atom’s central region, which is composed of protons and neutrons
nucleus
the number of protons (and electrons [in a neutral atom]) in the nucleus of an atom, and is the same for all of the atoms of an element
atomic number
the mass of an atom that is 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 are more different substances by chemical means
compound
the smallest unit of a substance that keeps all of 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 and 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 ions and the electrons around them
metallic bond
a sample of matter, either a single element or a single compound, that has definite physical and chemical properties
pure substance
