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Trends Across Period 2 of the Periodic Table |
| Name of Element Symbol | Lithium Li | Beryllium Be | Boron B | Carbon C | Nitrogen N | Oxygen O | Fluorine F | Neon Ne Atomic Number, z
| 3
| 4
| 5
| 6
| 7
| 8
| 9
| 10
| Electronic Configuration
| 2,1
| 2,2
| 2,3
| 2,4
| 2,5
| 2,6
| 2,7
| 2,8
| Atomic Radius (picometers)
| 152
| 112
| 88
| 77
| 70
| 66
| 68
| 67
| 1stIonization Energy (kJ/mol)
| 526
| 905
| 810
| 1090
| 1410
| 1320
| 1690
| 2090
| Electronegativity
| 1.0
| 1.5
| 2.0
| 2.5
| 3.0
| 3.5
| 4.0
| -
| Melting Point (oC)
| 180
| 1280
| 2027
| graphite 3272 | diamond >3700 -210
| -219
| -187
| -248.6
| Boiling Point (oC)
| 1330
| 2480
| 3900
| graphite 4827 | diamond - -196
| -183
| -188
| -246.1
| Electrical Conductance | (mho) excellent | 105 good | 5.4x105 poor | 2x10-5 graphite good | diamond no no
| no
| no
| Lustre
| metallic
| metallic
| metallic
| graphite faint metallic | diamond brilliant dull
| dull
| dull
| Metallic Character
| metal
| metal
| semi-metal (metalloid)
| non-metal
| non-metal
| non-metal
| non-metal
| non-metal
| |
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| Link: | Description |
| AUS-e-TUTE | Periodic Table of the Elements |
| AUS-e-TUTE | Trends in Group I |
| AUS-e-TUTE | Trends in Group II |
| AUS-e-TUTE | Trends in Group VII |
| AUS-e-TUTE | Trends in Period 3 |