a positive electrical charge in the nuclei

a particle inside a nuclei with out a electrical charge

a particle with a negative charge in a nuclei

the fixed amount of energy a system has

the pattern a electron travels around a nucleus

the electron in the outermost shell

when you organize elements by atomic number it atomically organizes groups of similar properties

a length or portion of time

a number of things that are classed together

gains or looses a electron

when a molecule has gained or lost electrons is called an

a positively charged ion

negatively charged ion

the total number of protons and neutrons in a nucleus

two or more forms of the same element that have the same number of protons but different number of neutrons

a unit of mass used to express atomic and molecular weight

the average weight

a solid hard shiny fusible material that is conductive

this is a conductor between insulators' and most metals

lithium potassium rubidium sodium cesium francium

any of the elements beryllium,magnesium,calcium,strontium,barium, and radium

aay of the set of metallic elements occupying a central block groups ibv vii ib and ibb

non metallic elements that form strong acidic compounds with hydrogen

any of the gaseous elements

a non metallic substance