the characteristics of a substance that can be observed or measured without changing the substance
characteristic that cannot be observed without altering the substance
A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.
any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
elements that are poor conductors of heat and electric current
mass unit (amu)
a unit of measurement for mass
total mass of the protons and neutrons in an atom, measured in atomic mass units
Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium
group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
one of the elements of group 18 of the periodic table(helium, neon,argon, krypton, xenon, and radon); noble gases are unreactive
the repeating pattern of chemical and physical properties of the elements. Melting and boiling points.
material that allow electric charges to move easily
substances that conduct thermal energy very well
materials that prevent electric charges from flowing through them easily
Why are elements arranged in the periodic table?
It has to do with the way the orbitals (electron shells) are arranged on atoms.
What sort of information can the periodic table of elements give you?
The number of protons, electrons, and neutrons of each element. It can also give you information about groups or families (highly reactive, metals or nonmetals, etc.)
Why does the periodic table have the shape that it does?
Because Mrs. Delaney, Mrs. Schneider, and Mr. Doolittle designed it.