What compound are all organisms made of
is an element that lacks most of the properties of a metal
These are poor conductors of electricty and heat and are reactive with other elements. The solids of this are dull and brittle
consist of two atoms
means "salt forming"
Elements in Group 18
Alone in the upper left corner of the periodic table, the element with the simplest and smallest atoms
have characteristics of both metals and nonmetals. All are solids at room tempearture
are substances that can conduct electiricty under some conditions but not under other conditions
the atomic nuclei of unstable isotopes release fast moving particles and energy
spontaneous emision of radiation by an unstable atomic nucleus
Consists of two protons and two neutrons and is positively charged
is a fast moving electron given off by a nucleus during radioactive decay
consists of high- energy waves, simiular to x-rays.
are radioactive isotopes that can be followed through the steps of a chemical reaction or industrial process