`In this lesson we discussed how to abbreviate electron configurations using what is called noble gas configuration. So if you were writing such a configuration for phosphorus, which noble gas would you use?

Express the following number in scientific notation. 0.026890 =

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?