7123703
Beschreibung
Karteikarten von Farha Idrees, aktualisiert more than 1 year ago
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Erstellt von Farha Idrees
vor mehr als 7 Jahre
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| Frage | Antworten |
| Who made the modern periodic table? | Dmitri Mendeleev- he left gaps for the unknown elements |
| What determines an element's position on the periodic table? | The atomic number |
| What are the columns of the periodic table called? | groups they are numbered, and an element's group number is the same as the number of electrons in its outer shell |
| True or False all elements in a group have similar chemical properties | True. |
| How do they react? 1) metals 2) non-metals 3) noble gases | 1) by losing electrons 2) by gaining electrons 3) very unreactive due to their stable electronic structures |
| What does an element's period (horizontal row) tell us? | An element's period number is the same as the number of occupied energy levels |
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