| gaseous state | 0.25 |
| form covalent bonds | 0.49 |
| form 5 to 7 membered ri… | 0.33 |
| burn in air | 0.25 |
| four bonds | 0.82 |
| compound | 0.68 |
| six electrons | 0.43 |
| a valency of four | 0.33 |
| four valence electrons | 0.25 |
| positive charge | 0.25 |
| 6 protons | 0.25 |
| oxidized | 0.62 |
| attached to nitrogen | 0.59 |
| combined with hydrogen | 0.57 |
| combined with oxygen | 0.57 |
| produced | 0.56 |
| bonded to halogen | 0.39 |
| replaced | 0.39 |
| bound to either oxygen … | 0.33 |
| numbered | 0.28 |
| bonded to four other at… | 0.25 |
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