| A | B |
|---|
| Alkali Metals | The most active metals. |
| Ductile | Easily pulled into a wire |
| Atomic Number | Number of protons in the nucleus |
| Family / Group | Columns of the Periodic Table |
| Atomic Mass | Protons + Neutrons = ? |
| Transition Elements | Nearly all are recognizable metals |
| Period | A row of elements on the Periodic Table whose properties change gradually and predictably |
| Malleable | Easily bendable; easily shaped |
| Atoms | Building blocks of all matter |
| Noble Gases | Inert gases (under normal conditions) |
| Nonmetals | Conduct heat poorly, dull, low melting point |
| Halogen Family | "Salt Formers" |
| Valence | Electrons found on outermost energy level |
| Metalloids | 7 elements along the zigzag line |
| Boron Family | Family with 3 valence electrons found in column 13 |
| Carbon Family | Family with 4 valence electrons found in column 14 |
| Stable elements have | a full outer electron shell |
| Atoms with a positive or negative charge | IONS |
| Why is this water molecule stable? | outer shells all filled by covalent bond |
| Na and Cl readily combine to form | Sodium chloride (common table salt) |
| Most abundant element in the universe | hydrogen |
| The physical building block of all other elements | hydrogen |
| Birthplace of all elements | STARS! |
| Most elements on the periodic table are.... | METALS |
| Elements in the same column have... | Same number of valence electrons |
| What element in the same row have in common | Same number of electron energy levels |
| Father of the Periodic Table | Dmitri Mendeleev |
| Identified the proton | Rutherford |
