click below
click below
Normal Size Small Size show me how
Periodic table vocab
Periodic table vocabulary
Term | Definition |
---|---|
atomic mass | average mass of all the isotopes of that element |
atomic number | number of protons in the nucleus of an atom |
chemical symbol | one or two letter abbreviation for an element |
periodic table | arrangement of elements showing a repeating pattern |
neutron | particle in the nucleus that has no charge |
period | term for the rows of the periodic table |
nucleus | very center of the atom |
electron | negatively charged particle that orbits the center of an atom |
group | term for the columns of the periodic table also known as families |
proton | positively charged particle in the nucleus of the atom |
metal | elements that are good conductors of electricity and heat often shiny and bendable |
luster | shiny and reflective |
malleable | can be hammered or rolled into flat sheets or shapes |
ductile | can pulled out or drawn into long wires |
thermal conductivity | ability to transfer heat |
electrical conductivity | ability to carry electrical current |
reactivity | ease and speed with which one element combines with another |
corrosion | deterioration of a metal due to a chemical reaction |
alkali metals | most reactive elements, are seldom found uncombined with other atoms |
alkaline earth metals | these metals are harder and denser and melt at higher temperatures |
nonmetal | element that lacks most properties of a metal. mostly found on the right side of periodic table |
diatomic molecule | two molecules of the nitrogen family are combined with each other and is not very reactive |
halogens | means "salt forming" flourine, bromine, chlorine and iodine. very reactive |
noble gasses | elements of group 18. Do not normally form compounds because they do not share electrons |
metalloids | have some properties of metals and some of nonmetals. Solid at room temperature. Hard Brittle and somewhat reactive |
semiconductors | substances that can conduct electricity under some conditions |