+------------+----------+----------------+-----------+-----------+-------------+
| Element | Number | Valence Electr | Melting | Boling | Density at |
| | | ons/shell | Point | Point | STP (g/cm<s |
| | | | (°C) | (°C) | up>3</sup> |
+============+==========+================+===========+===========+=============+
| Oxygen | 8 | 2, 6 | -219 | -183 | 0.00143 |
+------------+----------+----------------+-----------+-----------+-------------+
| Sulfur | 16 | 2, 8, 6 | 120 | 445 | 2.07 |
+------------+----------+----------------+-----------+-----------+-------------+
| Selenium | 34 | 2, 8, 18, 6 | 221 | 685 | 4.3 |
+------------+----------+----------------+-----------+-----------+-------------+
| Tellurium | 52 | 2, 8, 18, 18, | 450 | 988 | 6.24 |
| | | 6 | | | |
+------------+----------+----------------+-----------+-----------+-------------+
| Polonium | 84 | 2, 8, 18, 32, | 254 | 962 | 9.2 |
| | | 18, 6 | | | |
+------------+----------+----------------+-----------+-----------+-------------+
| Livermoriu | 116 | 2, 8, 18, 32, | 220 _(pre | 800 _(pre | 14 _(predic |
| m | | 32, 18, 6 | dicted)_ | dicted)_ | ted)_ |
| | | _(predicted)_ | | | |
+------------+----------+----------------+-----------+-----------+-------------+