click below
click below
Normal Size Small Size show me how
Periodic Table Org.
History and organization of the periodic table
| Question | Answer |
|---|---|
| In the modern periodic table, elements are organized by... | Atomic number |
| What was special about Mendeleev's periodic table? | He left spaces for undiscovered elements |
| How many periods are there in the modern periodic table? | 7 |
| What is a period? | A horizontal row |
| What is a group? | A vertical column |
| Elements in a group have similar.... | Reactivity and other properties |
| Non-metals are found on what part of the periodic table? | The upper right |
| Metals are found on what part of the periodic table? | The lower left |
| Semimetals or metalloids are found where on the periodic table? | On the zig zag that goes from upper left to lower right |
| Group 17 is an element family called... | Halogens |
| How many groups are there on the modern periodic table? | 18 |
| What are some properties of metals? | Shiny, ductile, malleable, conduct electricity and heat |
| What are some properties of non-metals? | Dull, brittle, do not conduct electricity |
| What are the elements that have properties of both metals and non-metals called? | Metalloids or semi-metals |
| Name some elements that are in the alkaline metal family | Lithium, sodium, potassium, rubidium, cesium |
| What is the name of elements in group 2? | Alkaline earth metals |
| What are the elements in group 18 called? | Noble gases |
| What are the elements in the middle of the table (the d block) called? | Transition metals |