Describe the 3 categories that the periodic table can be divided into. Be prepared to provide this information for an element on the periodic table.

How many moles are equal to 1.3 x 10^24 atoms of aluminum?

A 0.01 m solution of a substance has a ph of 2. what can you conclude about this substance?

What things can water do while in the gaseous phase?

After 1911, most scientists accepted the theory that nucleus of an atom was very dense and very small and has a positive charge. What led scientists to accept this theory?

A scientist hypothesizes that fertilizer containing 10 percent nitrogen will produce tomato plants with more leaves and blossoms than fertilizer containing 15 percent nitrogen.

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum

At 100 degrees c, water reacts with acetic anhydride to make acetic acid. also, at 100 degrees c, water reacts with acetylsalicylic acid and reverts it to salicylic acid and acetic acid.

What is the valence electron configuration of the group 2a elements?