Which orbital is the first to fill with electrons in a given principal energy level

1) In a chemical reaction, if a color change is detected, if an odor change is detected, or if a precipitate is formed, then: A. a chemical reaction has definitely occurred B. only physical reactions have occurred C.

A wave with what property has the highest energy? A - long wavelength B - short wavelength C - low frequency D - high transparency

How many moles of Fe2O3 are in 241 g of the compound?

What alkene gives a mixture of acetone and propanoic acid on reaction with potassium permanganate in the presence of strong acid and water?

A 34.53 ml sample of a solution of sulfuric acid, h2s04, reacts with 27.86 ml of 0.08964 m naoh solution. calculate the molarity of the sulfuric acid solution

What is it called when copper can be stretched into s thin wire?

What river basin provide river water to charolette and gastoia?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

What is DNA? What information does it carry? Where is DNA located?

5. Differences in which property allow the separation of a sample of sand and seawater by filtration? A) concentration of ions B) volume of sample C) mass of sample D) particle size