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Chem. Ch. 2 Review
facts on the periodic table
| Question | Answer |
|---|---|
| Elements are organized in the periodic table | by the number of protons their atoms contain. |
| An element has a very low boiling point and very low reactivity | would be found in the far right column |
| Noble gases like Helium and Neon share the property | of normally being unreactive with other elements. |
| Basic compounds is made up of one carbon atom to every two oxygen atoms | Carbon Dioxide |
| The properties of the majority of the elements in the far left column of the periodic table | are highly reactive. |
| Iron, zinc and lead can be classified in the mineral group | metals |
| Group 18 | Noble gases |
| The elements in columns that have similar characteristics | groups |
| The horizontal row across the table | period |
| Group 1 or the alkali metal family | Reactive Metals |
| These elements are less reactive and can be found in groups 3-12 | Transition Metals |
| The central core of the atom that contains protons and neutrons | nucleus |
| Elements in the same column, up and down | families |
| Protons have a | positive charge |
| These elements are placed at the bottom of the chart so that the table is not too long | Lanthanide and Actinide |
| In the space around the nucleus these move around and carry a negative charge | electrons |
| Group 17, also known as the halogen family | Reactive Non-metals |
| The model of the atom | is not a true representation of the atom due to the fact that the electrons move about randomly and rapidly. The size of the atom is also incorrect. |