What is the 4th element on the periodic table

Beryllium is the fourth element of the periodic table.

Explanation:

Beryllium has four protons, so has an atomic number of four. The atomic number depends on the place it has in the periodic table. For example, hydrogen is the first element with one proton in its nucleus and an atomic number of one. Helium is the second element with two protons in its nucleus and an atomic number or two. It goes on. After helium is lithium, then beryllium.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.