Is elemental phosphorus dull or high luster?

The exception is the element hydrogen. ... solid at room temperature (with the exception of mercury); usually shiny; high melting point; good conductor of ... could be dull or shiny; conducts heat and electricity, but not as well as metals ... allotropes–Phosphorus, Selenium and Carbon (in the form of graphite.) ...

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

Tolerance to high levels of salinity