What is the Periodic Table and how does it organize the elements?
Section Objectives- Describe arrangement of the elements in the Periodic Table, find the number of protons and electrons using the Periodic Table, explain Atomic Number and Mass Number, calculate Atomic Mass. Key Terms – periodic table, atomic number, mass number, isotopes, atomic mass Decisions, Decisions – Why should we look at an arrangement of the elements? Why do YOU arrange anything at home? Do you have all your clothes in one drawer, or do you separate your socks from your undies? Do you keep your summer shorts and swim suits with your winter coats? NOPE. Same thing with elements – scientists have figured out how to group elements so that the grouping makes sense. The Periodic Table The numbers increase across and down. The Families are the columns and the rows are the Periods. The major groups are metals, non-metals and metalloids. Some important families are the alkali metals in family 1, the alkali earth metals in family 2, the halogens in family 17 and the Nobel gases in fam
