| A | B |
|---|
| How many sections can the table be divided into | 2 |
| Most non-metals are usually | non metals are usually gases or brittle solids |
| What is the only metal that is not a solid | mercury |
| how is Modern periodic table organized | arranged by increasing atomic number and into rows and periods |
| What is a period? | row of elements in the table whose properties change gradually |
| metals are malleable. malleable means | metals can be pressed or pounded into thin sheets |
| What did Mendeelev have to leave in his table in order to make it work | leave gaps |
| how mendeleev arranged his periodic table | arranged elements in order of increasing atomic mass |
