How many grams are in 4.5 moles of sodium fluoride?

First, you have to find the molar mass of sodium fluoride.

The equation for sodium fluoride is NaF (1 Na and 1 F). So, you look at the molar masses of Na and F on the periodic table (the numbers with the long decimals, under the Na or F symbol) and add them up.

Molar mass of Na = 22.990 grams/mole
Molar mass of F = 18.998 grams/mole
Molar mass of NaF = 22.990 + 18.998 = 41.988 grams/mol

So, multiply to find the number of grams:

1.from liquid state to gaseous state is evaporation 3.solid to liquid is melting 5. solid to gaseous state is sublimation 6. gas to solid state is decomposition 7. a change of state is known as the states of matters

They are all full and don't need any more electrons in there outer shell.