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Unit 2 Science
| Question | Answer |
|---|---|
| What is the outmost shield of electrons called? | Valence shell or shielded layer |
| What do all elements in a group have in common | |
| Same number of valence electrons | |
| 1st full electron shell 2nd 3rd 4th | 2 8 18 32 |
| The gas nozzle should be faced….when off | Perpendicular to spout |
| If an element gains one electron to satisfy the octet, then the ion of it will have a … | Negative charge because because there is more electrons than protons Ex: To make a octet in Chlorine, gain 1 electron to make 18. Now that there is 17 protons and 18 electrons, there is a negative charge |
| Calcium has electrons in which of the following energy levels. Why? | Calcium fills up 4 energy levels because it is in period 4 on the periodic table |