Jennifer, Alex, Aldric, I dont know
What have scientist known science they have been able to isolate pure elements
Some elements have very similar physical and physical properties.
what are common physical properties of lithium, sodium, and potassium?
silvery-grey metals, soft enough to cut
what property of elements is relatively easy to determine?
what other name is used to describe atomic mass?
what did scientist call groups of 3 similar elements?
what seemed significant about the average atomic mass of similar elements in a triad?
similar physical and chemical properties seemed to show that these elements were related on a deeper level.