a substance which consists of two or more elements or compounds not chemically combined together
a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom
Atomic _____:
approximately equivalent to the number of protons and neutrons in the atom
mixture in which the composition is not uniform throughout the mixture
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light
___ atom has a net-zero charge
mixture in which the composition is uniform throughout the mixture
element that shares some properties with metals and some with nonmetals
represents the rows on the periodic table
Chemical _____:
The abbreviation used to represent a given element on the periodic table
a stable subatomic particle with a charge of negative energy
The model that has an atom consisting of a small, positively charged nucleus orbited by negatively charged electrons
Electrically neutral particle inside the nucleus of an atom
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon
a column of elements in the periodic table of the chemical elements
_____ level: any discrete value from a set of values of total energy for a subatomic particle confined by a force to a limited space or for a system of such particles
quantitative measure of inertia, a fundamental property of all matter